1. Department of Medicine, OUH Svendborg Sygehus, Svendborg, Denmark
2. Department of Clinical Research, University of Southern Denmark (SDU), Odense, Denmark
3. Surgical Research Unit, OUH, Odense, Denmark
4. Department of Social Medicine and Public Health, Pomeranian Medical University (PMU), Szczecin, Poland
5. Department of Gastroenterology, PMU, Szczecin, Poland
6. Department of Biochemical Sciences, PMU, Szczecin, Poland