1. Faculty of Medicine, University of Medicine and Pharmacy Carol Davila Bucharest, 050474 Bucharest, Romania
2. Gastroenterology Department, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
3. Department of Cardiovascular Surgery, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
4. Medical Sciences Section, Academy of Romanian Scientists, 050085 Bucharest, Romania
5. Internal Medicine Department, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania