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Correspondence: arahman@icddrb.org
JP, AM, LS, MK, DH, and AR contributed to the study concept and design.
AR, JP, and AM supervised implementation of the study.
JP, MR, AR, DH and AR coordinated collection of field data and contributed initial data cleaning and analyses.
JP crafted the initial draft of the manuscript.
All authors read and approved the final manuscript.
We gratefully acknowledge these donors for their support and commitment to icddr,b’s research efforts.
The authors declare that they have no competing interests.
This research study was funded by icddr,b and its donors which provide unrestricted support to icddr,b for its operations and research.
Current donors providing unrestricted support include: Australian Agency for International Development (AusAID), Government of the People’s Republic of Bangladesh; Canadian International Development Agency (CIDA), Swedish International Development Cooperation Agency (Sida), and the Department for International Development, UK (DFID).
© 2012 Pervin et al.; licensee BioMed Central Ltd.