Affiliation: | Indian Council of Medical Research, National Institute of Epidemiology, Chennai, India (P. Ranjan, S. Selvaraju, M. Murhekar); ;Indian Council of Medical Research, National Institute of Epidemiology, Gorakhpur, India (M. Gore); ;Baba Raghav Das Medical Collage, Gorakhpur (K.P. Kushwaha, D.K. Srivastava) |