Human intestinal spirochetosis as a cause of chronic diarrhea in an HIV-positive patient: A case report A.J. Chaar; J.S. Arbelaez; M.J. Vargas; R.A. Cañadas;

Gastrointestinal bleeding as the first manifestation of gastric amyloidoma: A case report A.C. Hani; A. Tobón; M.J. Vargas; O.M. Muñoz;