1 Faculty of Medicine, Al-Azhar University, Cairo, Egypt.
2 Tribhuvan University Teaching Hospital, Institute of Medicine, Kathmandu, Nepal.
3 Grupo de Investigación Biomedicina, Faculty of Medicine, Fundación Universitaria Autónoma de las Américas, Pereira, Colombia; Master of Clinical Epidemiology and Biostatistics, Universidad Científica del Sur, Lima, Peru.
4 New York State Department of Health, New York, NY 10013, USA. Electronic address: jaffer.shah@drexel.edu.