Funding for this research was provided by:
Wellcome Trust (220211)
Received: 20 February 2021
Accepted: 6 May 2021
First Online: 10 June 2021
: This study was discussed with the Tak Community Advisory Board before full ethics submission to obtain input from local community representatives. The Ethical Committee of the Faculty of Tropical Medicine, Mahidol University in Bangkok (TMEC 09-050) and the Oxford Tropical Research Ethic Committee (OXTREC 45-09) approved the protocol in 2009 and an amendment in 2012. This study was registered in ExternalRef removed (NCT01054248). Written informed consent was obtained before entry to the study.
: This study received partial financial support from the Holley Pharmacy (China). The authors declare that they have no other competing interests.