Funding for this research was provided by:
Economic and Social Research Council (ES/J018651/1)
Received: 30 August 2017
Accepted: 1 March 2018
First Online: 20 March 2018
Ethics approval and consent to participate
: Ethical clearance was obtained from the Ethical Review Board of icddr,b, on the 1st July 2013, Protocol Number: PR-13026.
: All the data collected in our study did not include any respondent identifiable personal information. All participants provided informed consent for their anonymized responses to be published in a scientific journal.
: The authors declare that they have no competing interest.
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