1 Department of Medicine, Second Medical Clinic, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Macedonia, Greece.
2 Pancreaticobiliary Medicine Unit, University College London Hospitals (UCLH), London, UK.
3 First Laboratory of Pharmacology, 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 School of Helthcare Sciences, Midwifery Department, University of West Macedonia, Koila, Kozani, Macedonia, Greece.
6 Department of Gastroenterology, Theageneio Hospital, Thessaloniki, Macedonia, Greece.
7 Department of Gastroenterology, General Military Hospital of Athens, Attiki, Greece.