Funding for this research was provided by:
Harvard T.H. Chan School of Public Health (NA)
Bill and Melinda Gates Foundation (NA)
Wellcome Trust (NA)
Received: 4 July 2019
Accepted: 5 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Oxford Tropical Research Ethical Committee, Bangladesh Medical Research Council Ethical Committee and Harvard University Human Research Protection Program. All patients recruited provided written consent.
: Not applicable.
: The authors declare that they have no competing interests.