1 Department of Medicine, Second Medical Clinic, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Macedonia, Greece.
2 Department of Gastroenterology, University Hospital of Larisa, Mezourlo, Larisa, Greece.
3 First Laboratory of Pharmacology, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece.
4 Division of Gastroenterology and Hepatology, Medical University Department, Kantonsspital Aarau, Aarau, Switzerland.
5 Faculty of Midwifery, School of Health Sciences, University of Western Macedonia, Greece.
6 Department of Nutritional Sciences and Dietetics, School of Health Sciences, International Hellenic University, Alexander Campus, Thessaloniki, Macedonia, Greece.
7 Department of Gastroenterology, 401 General Military Hospital of Athens, Athens, Greece.