1. Instituto Universitario del Hospital Italiano; Argentine Cochrane Centre; Potosí 4234 Buenos Aires Buenos Aires Buenos Aires Argentina C1199ACL
2. Hospital Italiano de Buenos Aires; Urology Division; Juan D. Peron 4190 Ciudad Autónoma de Buenos Aires Buenos Aires Argentina C1181ACH
3. Damascus University; Faculty of Medicine; Mazzeh Street Damascus Syrian Arab Republic
4. Instituto Universitario Hospital Italiano; Biblioteca Central; J.D. Perón 4190 Buenos Aires Argentina C1199ABB
5. Hospital Italiano de Buenos Aires; Family and Community Medicine Service; Buenos Aires Argentina