1 Centre for Community Medicine, All India Institute of Medical Sciences, New Delhi, India.
2 Indian Council Medical Research (ICMR)-National Centre for Disease Informatics and Research (NCDIR), Bengaluru, Karnataka, India.
3 Indian Council Medical Research (ICMR)-National Centre for Disease Informatics and Research (NCDIR), Bengaluru, Karnataka, India. director-ncdir@icmr.gov.in.