Authors’ contributions
JC, EDS, and SBA conceived and designed the study. EDS, JC, IK, and MBT conceived and designed the wider trial. CA, EDS, and SBA supervised the epidemiological field work. RN, AAK, and SBA advised on the study communities and coordination with local and national authorities. EDS coordinated the trial and oversaw data collection and management. JC, EDS, and CJA accessed and verified the epidemiological data. JC analysed the data. JC wrote the manuscript. All authors reviewed and approved the final manuscript.