1. UMF “Carol Davila” Gastroenterology & Hepatology Department; Clinic Fundeni Institute; Bucharest Romania
2. UMF “Carol Davila” Virology Department; Victor Babes Hospital; Bucharest Romania
3. UMF “Carol Davila” Internal Medicine Department; Colentina Hospital; Bucharest Romania
4. UMF “Carol Davila” Gastroenterology Department; Emergency Universitary Hospital; Bucharest Romania
5. UMF Timisoara, Gastroenterology & Hepatology Department; Timisoara Emergency Hospital; Timisoara Romania
6. UMF Gr T Popa Iasi, Gastroenterology & Hepatology Department; Gastroenterology & Hepatology Institute; Iasi Romania