BSc (Hons), MBBS (Hons), DTM&H, FRACP, FRCPE, PhD The Kirby Institute, University of New South Wales, Sydney, Applied Medical Research Unit and HIV, Immunology and Infectious Diseases Service, St. Vincent’s Hospital, Sydney, Medical Research Council Clinical Trials Unit, Institute of Clinical Trials and Methodology and Research Department of Infection and Population Health, Institute of Epidemiology and Health Care, University College London, UK