1. Division of Hospital Medicine, Mayo Clinic Health System, Eau Claire, WI, USA
2. Mayo Clinic College of Medicine and Sciences, Rochester, MN, USA
3. Department of Family Medicine, Mayo Clinic Health System, Eau Claire WI, USA
4. Gastroenterology Fellowship Program, The Wright Center for Graduate Medical Education, Scranton, PA, USA
5. Clinic for Gastroenterology and Hepatology, Clinical Center of Serbia, Belgrade, Serbia
6. School of Medicine, Belgrade University, Belgrade, Serbia