1. Research Center of Gastroenterology and Hepatology of Craiova, Craiova, Romania
2. University of Medicine and Pharmacy of Craiova, Craiova, Romania
3. “Lotus Life” Gastroenterology Private Hospital, Targu Mures, Romania
4. Ponderas Private Hospital, Bucharest, Romania
5. Copenhagen University Herlev Hospital, Herlev, Denmark