Funding for this research was provided by:
Wellcome Trust (106698)
Received: 11 September 2019
Accepted: 26 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: Ethical approval was granted by the University of Oxford Tropical Research Ethics Committee, UK (OxTREC 28–15), the Mahidol University Faculty of Tropical Medicine Ethics Committee, Thailand (TMEC 15–045) and the Tak Border Community Advisory Board, Thailand (T-CAB 6/2/2015). Written informed consent was sought from all women who agreed to participate.
: Consent for publication of data and findings arising from the study was included in participants’ consent forms, which were signed by all participants who agreed to participate in the study.
: The authors declare that they have no competing interests.