1. Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Przybyszewskiego St. 49, 60-355 Poznań, Poland
2. Department of Cell Biology, Poznan University of Medical Sciences, Rokietnicka St. 5D, 60-806 Poznań, Poland
3. Department of Pharmacology, Poznan University of Medical Sciences, Rokietnicka St. 5A, 60-806 Poznań, Poland
4. Department of General Surgery and Multiple Trauma and Division of Gastroenterological and Endocrine Surgery, Provincial Hospital, Juraszów St. 7/19, 60-479 Poznań, Poland