1. Second Medical Clinic, School of Medicine, Ippokration Hospital Aristotle University of Thessaloniki Thessaloniki Macedonia Greece
2. Division of Gastroenterology and Hepatology, Medical University Department Kantonsspital Aarau Aarau Switzerland
3. First Laboratory of Pharmacology, School of Medicine Aristotle University of Thessaloniki Thessaloniki Macedonia Greece
4. Department of Nutritional Sciences and Dietetics, School of Health Sciences International Hellenic University, Alexander Campus Thessaloniki Macedonia Greece
5. Department of Gastroenterology University Hospital of Larisa Larisa Greece
6. School of Healthcare Sciences, Midwifery Department University of West Macedonia Kozani Macedonia Greece
7. Department of Gastroenterology 401 General Military Hospital of Athens Attiki Greece
8. Healthcare Management Program, School of Economic and Management Open University of Cyprus Nicosia Cyprus
9. Alexandrovska University Hospital, Medical University Sofia Sofia Bulgaria