The #1 Medical Tourism Platform since 2014
Patient Safety
Patient Safety

Best CT (computer tomography) cardiologists in Turkey: TOP 338 doctors

author
Content meets the Bookimed Editorial Policy and is medically reviewed by
Fahad Mawlood - General practitioner. Winner of 4 scientific awards. Served in Western Asia. Former Team Leader of a medical team supporting Arabic-speaking patients. Now responsible for data processing and medical content accuracy.
image
Sinan Altan Kocaman
Cardiologist
22 years of experience
Turkey, Ankara
Private Koru Ankara Hospital

Sinan Altan Kocaman

Cardiologist
22 years of experience

Born in Ankara in 1980, he received his primary and secondary education in Artvin, his hometown. He graduated from Inebolu High School in 1997 and started studying at Ankara University Faculty of Medicine the same year. He received his Medical Doctor degree in 2003 and ranked high in the medical specialization exam the same year.

He started his cardiology specialization education in the Department of Cardiology at Gazi University Faculty of Medicine and became a cardiology specialist in 2008.

He served as an interventional cardiologist in Rize Education and Research Hospital during his mandatory service.

He worked in the field of electrophysiology with Prof. Dr. Remzi Karaoğuz at Ankara Güven Hospital. He became an Associate Professor in January 2014 and a Professor in 2023.

Throughout his academic career, he has published many scientific publications that have been published nationally and internationally and have received high citations. He provides patent and consultancy services for medical engineering in addition to clinical medical education and treatment services. He is a member of national and international scientific societies. He is currently working in interventional cardiology and cardiac electrophysiology fields in the Cardiology Clinic at Ankara Koru Çukurambar Hospital.

His medical interests include:

Cardiac electrophysiological (EPS) study and ablation therapy

Implantation and follow-up of cardiac pacemakers

Interventional Cardiology

Read more
image
Yusuf Serdar Sakin
Gastroenterologist
23 years of experience
Turkey, Ankara
Private Koru Ankara Hospital

Yusuf Serdar Sakin

Gastroenterologist
23 years of experience

Prof. M.D. Yusuf Serdar Sakin was born in Nevşehir in 1978. After completing his primary and secondary education in Ankara, he graduated from the Faculty of Medicine at Gülhane Military Medical Academy in 2002.
Following his graduation, he served in Gole/Ardahan for two years. He started his internal medicine training at the Department of Internal Medicine, Gülhane Faculty of Medicine.
After completing his training, he worked as an internal medicine specialist in Ankara. A year later, he began additional training in the Department of Gastroenterology at Gülhane Faculty of Medicine and completed his training in 2014.
After graduation, Yusuf Serdar Sakin continued to work in the same department. He also received advanced endoscopy and Motility training at AMC Center in the Netherlands in 2017.
After obtaining the title of Associate Professor in 2017, he became a Professor in 2023.
He currently provides medical services to patients at Koru Ankara Hospital. His areas of medical interest include:

-Endoscopic retrograde cholangiopancreatography (ERCP)
-Push enteroscopy
-Endoscopic mucosal resection
-High-resolution manometry
-pH/pH-impedance metry analysis
-Advanced endoscopic procedures (stenting, dilation, etc.)
-Gastrointestinal motility disorders
-Gastroesophageal reflux disease
-Inflammatory bowel diseases
-Advanced endoscopic procedures and pancreatitis.

Read more
image
Gulsah Bademci
Neurosurgeon
32 years of experience
Turkey, Ankara
Private Koru Ankara Hospital

Gulsah Bademci

Neurosurgeon
32 years of experience

Prof. Dr. Gülşah Bademci is a physician specialized in the field of brain, nerve, spine, and spinal cord surgery. She graduated as the fourth-ranked student from Ankara University Faculty of Medicine in 1993. She obtained her title as a brain and nerve surgeon from the Ankara University Faculty of Medicine Department of Brain and Nerve Surgery in 2001. In 2008, she became an associate professor at the Kırıkkale University Faculty of Medicine, and in 2021, she became a professor at the Yüksek İhtisas University Faculty of Medicine. She has contributed to numerous international publications, serving as a research and clinical fellow at the University of Arkansas Medical Sciences with Prof. Dr. M. Gazi Yaşargil, and as a research fellow at Yale University School of Medicine. She holds ECFMG America Board Step 1 and EANS European Board certificates. She speaks advanced-level English and has awards in tennis and swimming. She also pursues professional-level caricature art and medical illustration. In her 30-year career, she has performed numerous surgeries as a brain and nerve surgery specialist, particularly in spinal canal stenosis surgery, lumbar and cervical disc herniations, brain tumors, hydrocephalus surgery, and nerve compressions.

Read more
image
Kursat Fidanci
Pediatric cardiologist
26 years of experience
Turkey, Ankara
Private Koru Ankara Hospital

Kursat Fidanci

Pediatric cardiologist
26 years of experience

Kürşat Fidancı is a medical doctor who graduated from GATA Faculty of Medicine in 1999. Between 2000 and 2002, he served as the Chief Physician of the Şırnak Çakırsöğüt Commando Brigade. He completed his residency in Pediatrics from 2002 to 2006 at Istanbul GATA Haydarpaşa Training and Research Hospital. He worked as a Pediatrician at Ankara Beytepe Military Hospital between 2006 and 2009. He completed his subspecialty training in Paediatric Cardiology at GATA Faculty of Medicine Pediatric Cardiology Department from 2010 to 2013. He became an Assistant Professor in 2014 and obtained the title of Associate Professor in April 2016. He worked as a faculty member in the Department of Pediatric Cardiology at GATA Faculty of Medicine between September 2014 and December 2021. As a pediatric cardiologist, Dr. Kürşat Fidancı has seen numerous patients and his medical interests include Fetal Echocardiography, Congenital Heart Diseases, Rheumatic Heart Diseases, Rhythm Disorders, and Athlete's Heart Health and Follow-up.

Read more
image
Abdurrahim Gozen
Orthopedist
7 years of experience
Turkey, Ankara
Lokman Hekim Van Hospital

Abdurrahim Gozen

Orthopedist
7 years of experience

Dr. Abdurrahim Gözen, born in 1982 in Gercüş, Batman, is a specialist in Orthopedics and Traumatology with a focus on pediatric orthopedics, trauma, arthroscopy, and arthroplasty. After graduating from Istanbul University Medical Faculty, he completed his residency at Yüzüncü Yıl University. With over six years of professional experience in both state and private hospitals, Dr. Gözen is an active member of associations like TOTBİD and TUSYAD. He has participated in numerous national and international conferences, consistently enhancing his expertise in orthopedic surgery and advancing patient care practices.

Read more
image
Mustafa Tuncer
Cardiologist
36 years of experience
Turkey, Ankara
Lokman Hekim Van Hospital

Mustafa Tuncer

Cardiologist
36 years of experience

Prof. Dr. Mustafa Tuncer is a distinguished cardiologist at Lokman Hekim Van Hospital with over 30 years of medical experience. Fluent in Turkish and English, he earned his medical degree from Selçuk University in 1989 and attained a professorship in cardiology at Yüzüncü Yıl University in 2014. He has held key roles in institutions like Seydisehir and Erzurum before joining Lokman Hekim in 2021. Known for his dedication to advancing cardiac care, he specializes in comprehensive cardiology services, ensuring quality patient care through his expertise and commitment to the medical field.

Read more
image
Halil Baser
Cardiovascular surgeon
32 years of experience
Turkey, Ankara
Lokman Hekim Van Hospital

Halil Baser

Cardiovascular surgeon
32 years of experience

Prof. Dr. Halil Başel is a highly experienced cardiovascular and thoracic surgeon affiliated with Lokman Hekim University Hospital in Ankara, Turkey. With decades of expertise, he specializes in complex cardiovascular surgeries, thoracic procedures, and vascular interventions. He has contributed extensively to medical literature, presenting at numerous national and international congresses, particularly in areas like minimally invasive cardiovascular techniques, management of aneurysms, and advancements in thoracic surgery.

He has also been actively involved in educational and research endeavors, offering innovative approaches in heart and vascular surgeries, including treatments for valve disorders and peripheral arterial conditions.

Read more
image
Ismail Gulsen
Neurosurgeon
20 years of experience
Turkey, Ankara
Lokman Hekim Van Hospital

Ismail Gulsen

Neurosurgeon
20 years of experience

Assoc. Dr. İsmail Gülşen is a distinguished neurosurgeon serving at Lokman Hekim Van Hospital in Turkey. With extensive expertise in advanced brain and spine surgery, he has contributed significantly to the field through innovative techniques and patient-focused care. Dr. Gülşen specializes in diagnosing and treating complex neurological conditions, offering cutting-edge surgical interventions. His commitment to excellence is reflected in his continuous pursuit of medical advancements and personalized treatment strategies. For further details on his qualifications and professional achievements contact lokman hekim health group.

Read more
image
Sadullah Dastan
Dentist
6 years of experience
Turkey, Istanbul
denthouse Istanbul

Sadullah Dastan

Dentist
6 years of experience

Dr. Sadullah Dastan is a highly qualified dentist with a specialization in dentistry. He studied at the Faculty of Dentistry at Bezmialem University and graduated with a master's degree in 2018. With over 5 years of experience in the field, Dr. Dastan is dedicated to providing top-notch dental care to his patients.

Dr. Dastan is the Chief Physician and Co-Founder of Denthouse Istanbul, a prestigious dental clinic. His career achievements and commitment to excellence make him a trusted and respected professional. While the specific department where Dr. Dastan works is not mentioned, it is clear that he offers a wide range of dental services and is well-versed in the latest advancements in dentistry.

Dr. Sadullah Dastan's exceptional qualifications, extensive experience, and commitment to ongoing research make him an outstanding dentist. Patients can trust him for comprehensive dental care and the most advanced treatment options. Whether routine check-ups or complex procedures, Dr. Dastan is dedicated to providing top-level care to help his patients achieve and maintain optimal oral health.

Read more
image
Doctor Didem Karaçetin
Radiation oncologist
27 years of experience
4.7
18 reviews
Turkey, Istanbul
Neolife Medical Center

Doctor Didem Karaçetin

Radiation oncologist
27 years of experience

Areas of Interest

  • Breast Cancer
  • Prostate Cancer
  • Gastrointestinal System Tumors
  • Gynecological Tumors
  • Brain Tumors
  • Lung Cancer

Education
2021:

  • Professor Title, Health Sciences University Hamidiye Faculty of Medicine

2017 – 2018:

  • Master's Degree in Phytotherapy, Department of Pharmacognosy, Faculty of Pharmacy, Istanbul University

2015:

  • Associate Professor Title

1996:

  • Radiation Oncology Specialization, Princess Margaret Hospital, Toronto, Canada

1994 – 1998:

  • Radiation Oncology Specialization, Şişli Etfal Training and Research Hospital

1982 – 1988:

  • Trakya University Faculty of Medicine

Work Experience
2024:

  • Neolife Medical Center – Biruni University

2021 – 2024:

  • Health Sciences University (Hamidiye Faculty of Medicine – Bursa Medical Faculty – Izmir Medical Faculty – Lecturer)

2020 – 2024:

  • SBÜ Başakşehir Çam and Sakura City Hospital – Education and Administrative Officer

2015 – 2020:

  • Dr. Sadi Konuk Training and Research Hospital – Radiation Oncology Clinical Department Setup and Administrative Officer

2013 – 2020:

  • Gelişim University – Lecturer, Radiation Therapy Technician Program

2009 – 2015:

  • Istanbul Training and Research Hospital, Radiation Oncology Center Setup, Clinical Administrative Responsibility, and Chief Assistant

1998 – 2009:

  • Şişli Etfal Training and Research Hospital, Radiation Oncology Clinic Chief Assistant

Professional Trainings
2023:

  • Project Creation and Development on Artificial Intelligence and Radiotherapy Treatment Planning Systems with Yıldız Technical University

2023:

  • Hydrogel Space Oar Application and Certification Training, Başakşehir Çam and Sakura City Hospital

2015:

  • Turkish Radiation Oncology Association (Mammography Working Group, Integrative Working Group, Stereotactic Working Group, Uro-Oncology Working Group), Researcher

2020:

  • Hydrogel Space Oar Application and Certification Training, Başakşehir Çam and Sakura City Hospital

2018:

  • Distance Good Clinical Practices Training; Basic Good Clinical Practices Course

2011:

  • Lifelong Learning Program Leonardo da Vinci Mobility Projects, European Union Education and Youth Programs Directorate

2008:

  • Brachytherapy Training, Istanbul University, Oncology Institute

Memberships
2022 – 2024:

  • President of Sakura Science and Academician Association (SABADER)

2023:

  • Turkish Radiation Oncology Association, Integrative Working Group Executive Board Member

2021:

  • Cam & Sakura Medical Journal, Section Editor

2018:

  • Interdisciplinary Oncology Association, Substitute Member of the Executive Board

1995:

  • Turkish Radiation Oncology Association

1989:

  • Turkish Medical Association

Scientific Works

  • A.1 Karacetin D, Yalcin B, Okten B, Oztürk S, Maral O, Incekara O (2009). Capecitabine and oxaliplatin (XELOX) as first-line treatment for patients with metastatic colorectal cancer. JBUON, 605-608
  • A.2 Yılmaz O B, Karacetin D, Kabukcuoglu F, Taskin T, Yener S (2011). Immunohistochemical study of E-cadherin and β-catenin expression in colorectal carcinomas. Pol J Pathol, 62(1), 19-24
  • A.3 Karacetin D, Cakir A, Agaoglu F, Çamlıca H, Ergen A, Dizdar Y, Darendeliler E (2010). Dose distribution in 3-dimensional conformal radiotherapy for prostate cancer: comparison of femur doses for four treatment techniques. Journal of Radiotherapy in Practice, 41-51
  • A.4 Baycan D, Karacetin D, Balkanay A, Barut Y (2012). Field-in-field IMRT versus 3D-CRT of the breast. Cardiac vessels, ipsilateral lung, and contralateral breast absorbed doses in patients with left-sided lumpectomy: a dosimetric comparison. Jpn J Radiol, DOI: 10.1007/s
Read more
image
roman Ibrahimov
Radiation oncologist
27 years of experience
4.7
18 reviews
Turkey, Istanbul
Neolife Medical Center

roman Ibrahimov

Radiation oncologist
27 years of experience

Education:

  • 2008 – 2012: Marmara University School of Medicine (Specialization Training)
  • 1998 – 2005: Istanbul University Cerrahpaşa School of Medicine

Work Experience:

  • 2012 – Present: Neolife Medical Center

Memberships:

  • Turkish Society of Radiation Oncology

Scientific Works:

2014:

  • 11th National Radiation Oncology Congress
    • Oral Presentation: "Late-stage kidney damage after chemoradiotherapy in gastric cancer patients, clinical, functional, and dosimetric examination of tolerance doses."
    • Poster Presentation: "Early-stage stereotactic radiotherapy results in lung metastases."

2011:

  • 1st Evidence-Based Medicine Course
    • "Evaluation of late side effects in patients treated with conformal radiotherapy for localized prostate cancer: A TOG Side Effects Subgroup Study."
Read more
image
Yusuf Ziya Benek
Radiologist
38 years of experience
4.7
18 reviews
Turkey, Istanbul
Neolife Medical Center

Yusuf Ziya Benek

Radiologist
38 years of experience

Areas of Interest

  • Interventional Radiology
  • Thyroid Imaging and Interventions
  • Prostate Imaging and Interventions

Education
1980–1986: Istanbul University Cerrahpaşa Faculty of Medicine
1976–1980: Kabataş Boys' High School

Work Experience

  • Başkent University Istanbul Hospital
  • S.B. Haydarpaşa Numune Training and Research Hospital

Professional Training

  • Istanbul University Cerrahpaşa Faculty of Medicine (Medical Degree)
  • S.B. Haydarpaşa Numune Training and Research Hospital (Radiology Residency)
  • Anadolu University, Faculty of Open Education (Healthcare Management)

Memberships

  • Istanbul Medical Chamber
  • Istanbul Radiology Society
Read more
image
Specialist Doctor Umit Tuzun
Radiologist
20 years of experience
4.7
18 reviews
Turkey, Istanbul
Neolife Medical Center

Specialist Doctor Umit Tuzun

Radiologist
20 years of experience

Education

2000
Medical School Graduate – Istanbul University, Faculty of Medicine

2005
Radiology Department, Istanbul University, Istanbul Medical Faculty

Work Experience

2022 – Present
Neolife Medical Center

2015 – 2021
Sonomed Imaging Center

2015
Bezmialem Vakıf University

2011 – 2015
Echomar Imaging Center

2010 – 2011
Istanbul Bilim University

2008 – 2009
Derince Military Hospital

2007 – 2008
German Hospital-Taksim

2005 – 2007
Echomar Imaging Center

Professional Trainings

  • National Radiology Congresses
  • National Magnetic Resonance Society Meetings

Memberships

  • Turkish Radiology Society
  • Turkish Magnetic Resonance Society
  • Turkish Neuroradiology Society
  • RSNA (Radiological Society of North America)
  • ESR (European Society of Radiology)

Scientific Works

MRI findings in parosteal osteosarcoma: correlation with histopathology.
Dönmez FY, Tüzün U, Başaran C, Tunaci M, Bilgiç B, Acunaş G. Diagn Interv Radiol. 

The diagnostic efficiency of multislice CT virtual bronchoscopy in detecting endobronchial tumors.
Bakir B, Tüzün Ü, Terzibaşioğlu E, Dursun M, Güven K, Salmaslioğlu A, Tunaci A. Tuberk Toraks.

Diffusion MR findings in cyclosporin-A induced encephalopathy.
Aydin K, Donmez F, Tuzun U, Minareci O, Atamer T. Neuroradiology. 2004 

Diffusion tensor imaging findings of the brainstem in subjects with tonsillar ectopia.
Kurtcan S, Alkan A, Yetis H, Tuzun U, Aralasmak A, Toprak H, Ozdemir H. Acta Neurol Belg. 2018 Mar;

Diffusion Tensor Imaging Parameters in Children with Acute Hyperammonemic Encephalopathy Due to Urea Cycle Enzyme Defects and Organic Acidemia.
Kurtcan S, Alkan A, Guler S, Yesil G, Toprak H, Tuzun U, Yetis H, Aralasmak A, Ozdemir H, Iscan A. Current Medical Imaging Reviews. Volume 13, 2017 DOI: 10.2174/

The Contribution of DTI in Determining the Relationship of Epilepsy and Brain Lesions in Children with Tuberous Sclerosis.
Kurtcan S, Alkan A, Guler S, Yesil G, Toprak H, Tuzun U, Yetis H, Aralasmak A, Ozdemir H, Iscan A. Current Medical Imaging Reviews. Volume 13, 2017 DOI: 10.2174/

Brainstem cranial nerve diffusion changes in Wernicke encephalopathy secondary to necrotizing pancreatitis.
Kurtcan S, Alkan A, Aydin S, Tuzun U, Toprak H. Arch Med Sci Civil Dis 2016;1:e45–e50

Neuroimaging Features of Acquired Metabolic and Toxic Encephalopathies.
Ediz S.S, Kurtcan S, Alkan A, Aydin S, Tuzun U, Toprak H, Aralasmak A. Current Medical Imaging Reviews. Volume 13, 2017

Does the Application of Platelet-Rich Fibrin in Anterior Cruciate Ligament Reconstruction Enhance Graft Healing and Maturation? A Comparative MRI Study of 44 Cases.
Beyzadeoglu T, Pehlivanoglu T, Yildirim K, Buldu H, Tandogan R, Tuzun U. Orthop J Sports Med. 2020 Feb 20;8(2):

Deep learning for assessing image quality in bi-parametric prostate MRI: A feasibility study.
Alis D, Kartal MS, Seker ME, Guroz B, Basar Y, Arslan A, Sirolu S, Kurtcan S, Denizoglu N, Tuzun U, Yildirim D, Oksuz I, Karaarslan E. Eur J Radiol. 2023 Aug;165:110924. doi: 10.1016/j.ejrad.2023.110924. Epub 2023 Jun 11.

Awards

  1. TMRD 16th Annual Meeting Film Reading Session - 2nd Prize (2011)
  2. TMRD 17th Annual Meeting Film Reading Session - 3rd Prize (2012)
  3. TMRD 17th Annual Meeting Case of the Day - 3rd Prize (2012)
  4. TRD 33rd National Congress Case of the Day - 2nd Prize (2012)
  5. TMRD 18th Annual Meeting Film Reading Session - 3rd Prize (2013)
  6. TMRD 18th Annual Meeting Case of the Day - 3rd Prize (2013)
  7. TMRD 19th Annual Meeting Film Reading Session - 2nd Prize (2014)
  8. TMRD 19th Annual Meeting Case of the Day - 1st Prize (2014)
  9. TRD 36th National Congress Case of the Day - 2nd Prize (2015)
  10. TMRD 21st Annual Meeting Film Reading Session - 1st Prize (2016)
  11. TRD 37th National Congress Case of the Day - 1st Prize (2016)
  12. TMRD 37th National Congress Film Reading Session - 1st Prize (2016)
  13. TMRD 23rd Annual Meeting Film Reading Session - 1st Prize (2018)

 

Read more
image
Murat Duzgun
Neurosurgeon
14 years of experience
5.0
1 review
Turkey, İzmir
Can Hospitals Turkey

Murat Duzgun

Neurosurgeon
14 years of experience

KTU Faculty of Medicine 2005-2011

Izmir Ege University Faculty of Medicine Hospital Department of Brain and Nerve Surgery

2011-2017 Erzincan BY University Faculty of Medicine

2017-2023 Izmir University of Economics Medicalpark Hospital

 

AREAS OF INTEREST AND TREATMENT METHODS USED;

Spine Surgery

Lumbar hernias, (fully closed herniated disc surgery, microsurgery herniated disc surgery)

Cervical hernias (fully closed cervical disc herniation surgery, microsurgery cervical disc herniation surgery)

Spinal Fracture Treatment (open surgery and fully closed surgery = kyphoplasty vertebroplasty)

Scoliosis (Spine Curvatures)

Ankylosing Spondylitis (Hunchback)

Spine Tumors

Nerve Compression

Endoscopic (Closed Method) Brain Tumor Surgeries

Brain tumor surgery with neuronavigation

Brain Hemorrhages

Pain Intervention Procedures (Radiofrequency, Laser)

Hydrocephalus (accumulation of water in the brain)

Congenital Anomalies

Minimally Invasive Procedures and Head Traumas.

Read more
image
Nihat Acar
Orthopedist
9 years of experience
Turkey, Istanbul
Zaren Clinic

Nihat Acar

Orthopedist
9 years of experience

Education

  • 1992-1999 Hacettape University
  • 2000-2004 Dokuz Eylül University
  • 2007 Al-Azhar University
  • 2009 Al-Shefa Medical Complex

Memberships

  • 2016 TOAK Turkish Orthopedic Research Council
  • 2015 TOTBİD
  • 2005 Egyptian Orthopaedic Association EOA

Experience

  • 2004-2009 Balsam Hospitals, Gaza / Palestine
  • 2009-2013 AL-SHIFA Training and Research State Hospital, Gaza / Palestine
  • 2007-2013 Al-Azhar University Faculty of Medicine, Gaza / Palestine
  • 2014-2015 Private Karatas Hospital, Izmir / Turkey
  • 2015-2016 Private Gazi Kent Surgical Medical Center, Izmir / Turkey
  • 2015-2016 West Anatolia Central Hospital, Izmir / Turkey
  • 2016 Catalca State Hospital, Istanbul / Turkey
Read more
image
Erol Cakmak
Gastroenterologist
28 years of experience
5.0
1 review

Erol Cakmak

Gastroenterologist
28 years of experience
Turkey, Sivas
Medicana Sivas Hospital
image
Sultan Kavrut
Gynecologist
26 years of experience
5.0
1 review
Turkey, Istanbul
Medistate Hospital Istanbul

Sultan Kavrut

Gynecologist
26 years of experience
Dr. Sultan Kavrut is an experienced gynecologist with specialized training in Polycystic Ovarian Syndrome and Endometriosis. She offers free consultations and personalized treatment plans with a personal medical coordinator and priority appointments, with a response time of 7 minutes.Read more
image
Cem Sever
Orthopedist
23 years of experience
4.2
5 reviews
Turkey, Istanbul
ISU Gaziosmanpasa

Cem Sever

Orthopedist
23 years of experience

accreditations:

Fellowship Examination of European Orthopedics and Traumatology (EBOT)

Op. Dr. Cem SEVER is a specialist doctor with a medical specialization in Orthopedics and Traumatology. He has a Bachelor's and Master's degree from Dokuz Eylül University and has a foreign language proficiency in English. He has a number of memberships to scientific organizations and a number of certificates and awards.

Read more
This page may feature information relating to various medical conditions, treatments, and healthcare services available in different countries. Please be advised that the content is provided for informational purposes only and should not be construed as medical advice or guidance. Please consult with your doctor or a qualified medical professional before starting or changing medical treatment.