1. Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
2. Department of Medical Biochemistry, Faculty of Medicine, Ege University, Izmir, Turkey
3. Division of Gastroenterology, Faculty of Medicine, Ege Reflux Study Group, Ege University, Izmir, Turkey
4. Department of Medical Biology, Faculty of Medicine, Ege University, Izmir, Turkey
5. Department of Pathology, Faculty of Medicine, Ege University, Izmir, Turkey
6. Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK