title: Cochrane column.
authors.affiliation: Centre for Evidence-based Health Care, & Division of Community Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa. E-mail: charlesw@sun.ac.za. Website: www.sun.ac.za/cebhc.
authors.forename: Charles S
authors.initials: CS
authors.lastname: Wiysonge
authors.affiliation: Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK. Email: D.J.Sinclair@liverpool.ac.uk.
authors.forename: David
authors.initials: D
authors.lastname: Sinclair
authors.affiliation: WHO Inter-Country Support Team, 82-86 Enterprise Road , Highlands, Harare, Zimbabwe. Email: nambozej@who.int.
authors.forename: Josephine
authors.initials: J
authors.lastname: Namboze
authors.affiliation: Department of Global Health & Development, London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK. Email: clare.chandler@lshtm.ac.uk, and Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
authors.forename: Clare I R
authors.initials: CI
authors.lastname: Chandler
authors.affiliation: Department of Global Health & Development, London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK. Email: clare.chandler@lshtm.ac.uk, and Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
authors.forename: Christopher J M
authors.initials: CJ
authors.lastname: Whitty