Received: 19 July 2017
Accepted: 20 March 2018
First Online: 2 April 2018
: SY (PhD) is Director; ST (MA) is Manager and CP (MPH) is Research Fellow at KHANA Center for Population Health Research in Cambodia. CB (PhD) is Associate Professor and HP (MPH) and TF (MPH) are graduate students at Public Health Program, Touro University California in the United States.
: The National Ethics Committee for Health Research, Ministry of Health, Cambodia approved this study (Ref: 0225NECHR). A verbal consent to participate in the study was obtained from each participant.
: 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.