1. University of Liverpool; Department of Public Health and Policy; Liverpool Merseyside UK
2. Cochrane; Cochrane Response; St Albans House 57-59 Haymarket London UK SW1Y 4QX
3. Cochrane; Cochrane Editorial Unit; St Albans House, 57 - 59 Haymarket London UK SW1Y 4QX
4. Liverpool School of Tropical Medicine; Department of Clinical Sciences; Liverpool Merseyside UK L3 5QA