Funding for this research was provided by:
Bill and Melinda Gates Foundation
Received: 5 December 2016
Accepted: 18 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: This study was approved by the institutional review board at University of Washington, Seattle, USA and International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b). All study participants provided informed written consent for their participation.
: Not applicable
: The authors declare that they have no competing interests.
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