1.
Salud Publica Mex
; 52(4): 290-1, 2010.
Article
in Spanish
| MEDLINE
| ID: mdl-20657957
2.
Salud pública Méx
; 52(4): 290-291, jul.-ago. 2010.
Article
in Spanish
| LILACS
| ID: lil-552884