1.
Rev. peru. med. exp. salud publica
; 30(4): 714-728, oct.-dic. 2013. ilus, graf
Article
in Spanish
| LILACS, LIPECS
| ID: lil-698137
2.
Rev Peru Med Exp Salud Publica
; 30(4): 714-5, 2013.
Article
in Spanish
| MEDLINE
| ID: mdl-24448955