1 Department of Gastroenterology, Saint Mary's Clinical Hospital, Bucharest, Romania.
2 2nd Department of Surgery, Saint Mary's Clinical Hospital, Bucharest, Romania.
3 Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy, Craiova, Romania.
4 Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy, Craiova; Department of Gastroenterology, Ponderas Academic Hospital Bucharest, Romania.