Affiliation: | 1. Section of Microbiology, Department of Pathology and Laboratory Medicine, Aga Khan University, Karachi, Pakistan;2. Section of Histopathology, Department of Pathology and Laboratory Medicine, Aga Khan University, Karachi, Pakistan;3. Department of Medicine. Dr. Ruth K.M. Pfau Civil hospital Karachi, Pakistan; Universidade Federal do Para, BRAZIL |