1 Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands.
2 Netherlands Trial Register and Cochrane Netherlands, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University of Utrecht, Utrecht, the Netherlands.
3 Australian New Zealand Clinical Trials Registry (ANZCTR), Systematic Reviews and Health Technology Assessment Team, NHMRC Clinical Trials Centre, University of Sydney, Sydney, Australia.
4 Office of Research Ethics and Integrity and Division of Technology, Information and Learning Services, Queensland University of Technology (QUT) Brisbane, Australia.
5 ISRCTN Registry, BioMed Central, London, UK.
6 Center for Statistical Sciences, Brown University School of Public Health, Providence, RI.
7 Australian New Zealand Clinical Trials Registry (ANZCTR), NHMRC Clinical Trials Centre, University of Sydney, Sydney, Australia.
8 Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA.
9 Department of Radiology, University of Ottawa, Ottawa, Canada.
10 Centre for Journalology, Ottawa Hospital Research Institute, Ottawa, Canada, School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Canada.
11 Department of Laboratory Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.
12 Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands, INSERM UMR 1153 and Department of Pediatrics, Necker Hospital, AP-HP, Paris Descartes University, Paris, France.
13 Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands. p.m.bossuyt@amc.nl.