1.
Rev. colomb. cir
;
23(2): 85-99, abr.-jun. 2008. tab
Article
in Spanish
| LILACS
| ID: lil-497878
2.
Rev. colomb. gastroenterol
;
19(1): 9-12, ene.-mar. 2004. ilus, graf
Article
in Spanish
| LILACS
| ID: lil-363717