1.
Rev. méd. Maule
;
17(2): 43-4, dic. 1998.
Article
in Spanish
| LILACS
| ID: lil-242732
2.
Acta méd. colomb
;
18(3): 134-9, mayo-jun. 1993.
Article
in Spanish
| LILACS
| ID: lil-183292