1. Department of Gastroenterology, “Carol Davila” University of Medicine and Pharmacy Bucharest, 020021 Bucharest, Romania
2. Department of Gastroenterology, “Carol Davila” University Central Emergency Military Hospital, 010825 Bucharest, Romania
3. Medical Analysis Laboratory, “Carol Davila” University Central Emergency Military Hospital, 010825 Bucharest, Romania
4. Department of Gastroenterology, Pucioasa City Hospital, 135400 Pucioasa, Romania