About the Authors

David Moher

dmoher@ohri.ca

Affiliations Ottawa Methods Centre, Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada, Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada

Kenneth F. Schulz

Affiliation Family Health International, Research Triangle Park, North Carolina, United States of America

Iveta Simera

Affiliation Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom

Douglas G. Altman

Affiliation Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom

Competing Interests

Competing interests: DM, KFS, IS, and DGA are members of the EQUATOR Network. DM, KFS, and DGA are members of the CONSORT executive. DM and DGA are members of the PRISMA executive. DM is on the Editorial Board of PLoS Medicine.

Author Contributions

ICMJE criteria for authorship read and met: DM KFS IS DGA. Wrote the first draft of the paper: DM. Contributed to the writing of the paper: KFS IS DGA.