Funding for this research was provided by:
John D. and Catherine T. MacArthur Foundation
Received: 7 August 2018
Accepted: 22 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The Institutional Review Board of the Columbia University Medical Center and Sigma IRB in Delhi gave ethical clearance for the study, including for verbal consent. Consent was verbal because signature on an informed consent form would otherwise be the most explicit personally identifiable information the study collected, thus making it the biggest threat to confidentiality.
: Not applicable
: The authors declare that they have no competing interests.