1.
Salud pública Méx
;
52(4): 288-289, jul.-ago. 2010.
Article
in English
| LILACS
| ID: lil-552882
2.
Rev. invest. clín
;
56(2): 153-168, abr. 2004. tab
Article
in Spanish
| LILACS
| ID: lil-632317