About the Authors

Peter C Gøtzsche

To whom correspondence should be addressed. E-mail: pcg@cochrane.dk

Affiliation Nordic Cochrane Centre, Copenhagen, Denmark

Asbjørn Hróbjartsson

Affiliation Nordic Cochrane Centre, Copenhagen, Denmark

Helle Krogh Johansen

Affiliation Nordic Cochrane Centre, Copenhagen, Denmark

Mette T Haahr

Affiliation Nordic Cochrane Centre, Copenhagen, Denmark

Douglas G Altman

Affiliation Centre for Statistics in Medicine, Oxford, United Kingdom

An-Wen Chan

Affiliation Department of Medicine, University of Toronto, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

PCG initiated the study; PCG, AH, HKJ, MTH, DGA, and AWC contributed to study design, acquisition and interpretation of data, and writing the paper. PCG is guarantor.