1.
Gac Med Mex
; 144(5): 441-3, 2008.
Article
in Spanish
| MEDLINE
| ID: mdl-19043965
2.
Gac. méd. Méx
; 144(5): 441-443, sept.-oct. 2008. ilus
Article
in Spanish
| LILACS
| ID: lil-568026