1.
Rev. panam. salud pública
;
12(4): 279-279, Oct. 2002.
Article
in Spanish
| LILACS
| ID: lil-327532
2.
Rev. panam. salud pública
;
12(4): 283-284, Oct. 2002.
Article
in Spanish
| LILACS
| ID: lil-327536