Funding for this research was provided by:
Centers for Disease Control and Prevention (5-U51-CI000298)
Received: 19 December 2017
Accepted: 10 July 2018
First Online: 3 August 2018
Ethics approval and consent to participate
: We received approval of the study protocol from icddr, b’s Ethical Review Committee (FWA # 00001468, Human Welfare Assurance # 00001822). All participants provided verbal informed consent for enrollment into the study. A Centers for Disease Control and Prevention (CDC) institutional review board concluded that the agency was not engaged with human subjects in this project.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.