University College London - Institute for Global Health, University College London, University College London - Institute for Global Health, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit, University College London - Institute for Global Health, University College London - Institute for Global Health, London School of Hygiene & Tropical Medicine, University College London - Institute for Global Health, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit, University College London - Institute for Global Health, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit, University College London - Institute for Global Health, University College London - Institute for Global Health, London School of Hygiene & Tropical Medicine, Örebro University, London School of Hygiene & Tropical Medicine, University College London - Institute for Global Health, University College London - Institute for Global Health, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit and University College London - Institute for Global Health