1. Centre for Global Health Research; Kenya Medical Research Institute; Kisumu Kenya
2. Centre for Evidence-based Health Care, Department of Global Health, Faculty of Medicine and Health Sciences; Stellenbosch University; Cape Town South Africa
3. KEMRI-Wellcome Trust Research Programme; Nairobi Kenya
4. Test Evaluation Research Group, Institute of Applied Health Research; University of Birmingham; Birmingham UK
5. UCL Centre for Medical Imaging, Division of Medicine, Faculty of Medical Sciences; University College London; London UK