1.
Rev Peru Med Exp Salud Publica
; 28(2): 337-41, 2011 Jun.
Article
in Spanish
| MEDLINE
| ID: mdl-21845316
2.
Rev. peru. med. exp. salud publica
; 28(2): 337-341, jun. 2011. ilus, graf, mapas, tab
Article
in Spanish
| LILACS, LIPECS
| ID: lil-596574