Huicho, Luis, Juan Rivera, Miguel Campos, and Richard L. Guerrant. 1996. “Combined Use of Qualitative Method and Metanalysis on the Diagnostic Approhach of Infectious Diarrhea”. Anales De La Facultad De Medicina 57 (4): 242-53. https://doi.org/10.15381/anales.v57i4.4882.