1 School of Medicine, Department of Epidemiology and Biostatistics, University of California, San Francisco, Mission Hall 550 16th St. 3rd Floor, San Francisco, CA 94158, USA.
2 Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, 650 Charles E. Young Dr. South, Los Angeles, CA 90095, USA.
3 Community Empowerment Lab, Lucknow, Uttar Pradesh, India.
4 Department of Statistics, University of Lucknow, Lucknow.
5 National Health Mission, Lucknow, Uttar Pradesh, India.