R. Callejas

Bacteriology of middle ear fluid specimens obtained by tympanocentesis from 111 Colombian children with acute otitis media

R. Callejas, G. Mejía, H. Trujillo, 1989, The Pediatric infectious disease journal.

Pulmonary hypertension in adults with sickle cell anemia. Preliminary results

C. Padrón, L. Barroso, O. Cabrera, 2010 .

Hipovolemic shock secondary to use of anticoagulants

R. Callejas, Paulo Lucas Capelini Frisso, 2020 .