University College London, University of Pittsburgh, Build Health International, University College London - Institute for Global Health, University College London - Institute for Global Health, University College London - UCL Centre for Advanced Research, University College London, Karolinska Institutet - Department of Global Public Health, Government of Malawi, Imperial College London - Department of Infectious Disease Epidemiology, Kamuzu University of Health Sciences, University of York - Centre for Health Economics, Imperial College London, Kamuzu University of Health Sciences, University of York, PATH, Imperial College London, PATH, University College London, University of York, University College London - Institute for Global Health, Imperial College London - MRC Centre for Global Infectious Disease Analysis and University College London - Institute for Global Health