| Autor: |
Valkov H; Department of Gastroenterology, Clinic of Gastroenterology, University Hospital 'Tsaritsa Yoanna-ISUL', Medical University of Sofia, Sofia, Bulgaria., Kovacheva-Slavova M; Department of Gastroenterology, Clinic of Gastroenterology, University Hospital 'Tsaritsa Yoanna-ISUL', Medical University of Sofia, Sofia, Bulgaria., Lyutakov I; Department of Gastroenterology, Clinic of Gastroenterology, University Hospital 'Tsaritsa Yoanna-ISUL', Medical University of Sofia, Sofia, Bulgaria., Vladimirov B; Department of Gastroenterology, Clinic of Gastroenterology, University Hospital 'Tsaritsa Yoanna-ISUL', Medical University of Sofia, Sofia, Bulgaria., Penchev P; Department of Gastroenterology, Clinic of Gastroenterology, University Hospital 'Tsaritsa Yoanna-ISUL', Medical University of Sofia, Sofia, Bulgaria. |
