Dr. Martin Claßen is a highly experienced pediatric gastroenterologist, specializing in functional disorders and inflammatory bowel disease in children and adolescents. He holds a degree in general medicine from the Heinrich-Heine-Universität Düsseldorf, a specialty in pediatrics from the University Children's Hospital of Essen and a specialty in gastroenterology in children from the Children’s Hospital at the University Hospital Frankfurt. He is a member of the European Society for Paediatric Gastroenterology Hepatology and Nutrition, the German Society of Pediatrics and Adolescent Medicine and the German Society of Ultrasound in Medicine.