1. Department of Gastroenterology, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
2. Department of Gastroenterology, Clinical Emergency Hospital of Bucharest, 014461 Bucharest, Romania
3. Department of Gastroenterology, Fundeni Clinical Institute, 022328 Bucharest, Romania
4. Department of Pathology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
5. Department of Gastroenterology, “Elias” Emergency University Hospital, 011461 Bucharest, Romania
6. Department of Pathology, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
7. Oncology Institute “Prof. Dr. Alexandru Trestioreanu”, 022328 Bucharest, Romania
8. Department of Gastroenterology, Emergency University Hospital, 050098 Bucharest, Romania
9. Department of Gastroenterology, Central Military Emergency Hospital “Dr. Carol Davila”, 010825 Bucharest, Romania