1. Department of Gastroenterology and Hepatology, University of Medicine and Pharmacy “Victor Babeş” Timişoara, Romania
2. Regional Institute of Gastroenterology and Hepatology "Prof. Dr. Octavian Fodor", University of Medicine and Pharmacy ”Iuliu Hatieganu” Cluj Napoca, Romania
3. Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy, Craiova, Romania
4. Department of Gastroenterology, Emergency Hospital Floreasca, Bucharest, Romania
5. Delta Promedical Hospital, Bucharest, Romania
6. Department of Gastroenterology, University of Oradea, Romania
7. 1st Medical Department, Central Military Emergency University Hospital “Dr. Carol Davila”, Bucharest, Romania
8. IIIrd Department of Gastroenterology and Hepatology, Clinical Institute Fundeni, Bucharest, Romania
9. Center of Internal Medicine, Fundeni Clinical Institute, Bucharest, Romania
10. Department of Anatomy and Embriology, University of Medicine and Pharmacy ”Iuliu Hatieganu” Cluj Napoca, Romania
11. Institute of Gastroenterology and Hepatology, "Grigore T. Popa" University of Medicine and Pharmacy Iaşi, Romania
12. Department of Gastroenterology, University of Constanta, Romania
13. Department of Internal Medicine and Gastroenterology, Emergency Hospital Floreasca, Bucharest, Romania
14. Ist, Medical Clinic, University of Medicine and Pharmacy “Iuliu Hatieganu” Cluj-Napoca, Cluj Napoca, Romania