1.
Rev. colomb. gastroenterol
;
5(3): 159-67, jul.-sept. 1990. tab
Article
in Spanish
| LILACS
| ID: lil-221604
2.
Acta méd. colomb
;
14(2): 111-9, mar.-abr. 1989. tab
Article
in Spanish
| LILACS
| ID: lil-70501