1. Department of Gastroenterology, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania
2. Department of Internal Medicine, Fundeni Clinical Institute, 022328 Bucharest, Romania
3. Department of Gastroenterology, “Sf. Ioan” Emergency Hospital, 014461 Bucharest, Romania
4. Department 5, “Carol Davila” University of Medicine and Pharmacy, 050447 Bucharest, Romania