[1] University College London,Centre for Clinical Research, Epidemiology, Modelling and Evaluation, Institute for Global Health
[2] University College London,MRC Clinical Trials Unit
[3] London School of Hygiene and Tropical Medicine,Department of Global Health and Development
[4] Elton John Centre,undefined
[5] Sussex House,undefined
[6] 56 Dean Street,undefined
[7] Chelsea & Westminster NHS Foundation Trust,undefined