David Moher1,2
, Iveta Simera3
, Kenneth F Schulz4
, John Hoey5
and Douglas G Altman3 
1Chalmers Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
2Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
3Centre for Statistics in Medicine, University of Oxford, Oxford, UK
4Family Health International, Durham, NC, USA
5Queen's University, Kingston, ON, Canada