1.
Rev Peru Med Exp Salud Publica
; 30(2): 355-7, 2013 Apr.
Article
in Spanish
| MEDLINE
| ID: mdl-23949534
2.
Rev. peru. med. exp. salud publica
; 30(2): 355-357, abr.-jun. 2013. graf, tab
Article
in Spanish
| LILACS, LIPECS
| ID: lil-681010