1.
Acta pediátr. costarric
;
16(2): 75-78, 2002.
Article
in Spanish
| LILACS
| ID: lil-403851
2.
Acta pediátr. costarric
;
15(1): 37-40, 2001.
Article
in Spanish
| LILACS
| ID: lil-359572
3.
Acta pediátr. costarric
;
15(3): 120-123, 2001.
Article
in Spanish
| LILACS
| ID: lil-359578