1.
Salud Publica Mex
; 51 Suppl 2: s305-8, 2009.
Article
in English
| MEDLINE
| ID: mdl-19967286
2.
Salud pública Méx
; 51(supl.2): s305-s308, 2009.
Article
in English
| LILACS
| ID: lil-509407