Contribution statement
RS, HL
RECRUITMENT
MJN and KR conceived the idea, and MJN and SJ led the design of the study with input from AG, SK and SM. AG and SK co-ordinated the study, and AG wrote the first draft of the paper with input from SK. KB, DW and HL conducted the statistical analysis. SJ, MJN, KR, UA, AG, SM and KB interpreted the findings. KR was the senior trial diabetologist and clinician, supported by UA. EM, RS and GC were the lead researchers at each site and were involved in recruitment, management and follow up of participants. SM oversaw all activity in Tanzania. EvW managed the data with input from AG, KB and SK. SJ co-ordinated the final write-up of the article with input and revisions from AG, KR, UA, MJN, SM, KB, DW, EM, RS, GC, HL and EvW on different parts of the article. All authors saw and approved the final version of the manuscript. AG is responsible for the integrity of this work as a whole.