1. Division of Gastroenterology, Department of Internal Medicine, University Hospital of Patras, 26504 Patras, Greece
2. Laboratory of Pharmaceutical Analysis, Department of Pharmaceutical Technology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
3. Department of Biochemistry, University Hospital of Patras, 26504 Patras, Greece
4. Division of Endocrinology, Diabetes and Metabolic Diseases, Department of Internal Medicine, University of Patras, 26504 Patras, Greece