Funding for this research was provided by:
The Wellcome Trust DBT India Alliance (IA/I/13/1/500879)
Grand Challenges Canada (0524-01-10)
Received: 15 December 2020
Accepted: 28 January 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: Ethics approval was received from the Independent Review Committee of the Centre for Chronic Disease Control, New Delhi, India. Approval for conducting the project was obtained from the Health Department, Government of Andhra Pradesh, and from all the local village administrative bodies. Informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.