Dr. Ahmet Yildizhan is a qualified neurosurgeon, specialist in spinal surgery with 30 years of experience who serves in Nisantasi Hospital (Istanbul). Dr. Yildizhan was educated in Turkey and the USA (Harvard University). His research on herniated disc is included in textbooks published in the United States and other countries of the world. The doctor is a member of the American Association of Neurosurgeons (AANS) and is listed among outstanding intellectuals of the 21st century at the International Biographic Center in Cambridge.