1. MRC Clinical Trials Unit; University College London; London UK
2. Research Department of Infection & Population Health; University College London; London UK
3. Department of Medicine; University of Calgary; Calgary AB Canada
4. Department of Clinical Epidemiology, Biostatistics and Bioinformatics; Academic Medical Center (AMC); Amsterdam The Netherlands
5. Department of Infectious Diseases; Public Health Service of Amsterdam; Amsterdam The Netherlands
6. Oxford University Clinical Research Unit; Wellcome Trust Major Overseas Programme; Ho Chi Minh City Vietnam
7. Nuffield Department of Clinical Medicine; Centre for Tropical Medicine and Global Health; University of Oxford; Oxford UK
8. Department of Hygiene, Epidemiology and Medical Statistics, Medical School; National and Kapodistrian University of Athens; Athens Greece
9. Basel Institute for Clinical Epidemiology and Biostatistics; University Hospital Basel and University of Basel; Basel Switzerland