1. “Sfantul Ioan’’ Clinical Emergency Hospital for Children , Galati , Romania
2. Faculty of Medicine and Pharmacy , “Dunarea de Jos” University , Galati , Romania
3. Emergency Clinical Hospital for Children M.S.Curie , Bucharest , Romania
4. Doctoral School, University “Ovidius” of Constanta
5. “Sfantul Apostol Andrei” Emergency Clinical Hospital , Galati , Romania