Received: 19 July 2018
Accepted: 9 November 2018
First Online: 23 November 2018
: Dr. Bhaskaran Unnikrishnan, one of the authors of the present study, is an editorial board member of BMC Public Health.
: The study used secondary data available and released under the National Data Sharing and Accessibility Policy (NDSAP) of Government of India. The data set had no identifiable information on the survey participants, therefore no ethical approval is required for this work.
: Not applicable.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.