Authors’ contributions
MP
All authors contributed to the concept and design of the study. MAC, RCS and AK did the interviewer training, and drafted the paper. All authors read and approved the study and the procedures. MAC and RCS prepared the submission to the ethical committee and prepared the logistics. MAC, RCS and JY prepared the field study, contacted the local leaders and organized the logistics. MP contributed to the statistical analysis. MAC, RCS, AK and MP formatted, revised and corrected the article until its final version. All authors read and commented on the draft paper and approved the final version.