Systematic review finds that study data not published in full text articles have unclear impact on meta-analyses results in medical research

• Christine M. Schmucker ,

  * E-mail: schmucker@cochrane.de

  Affiliation Cochrane Germany, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Germany

  http://orcid.org/0000-0002-1188-3158

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• Anette Blümle,

  Affiliation Cochrane Germany, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Germany

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• Lisa K. Schell,

  Affiliation Institute for Quality and Efficiency in Health Care, Cologne, Germany

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• Guido Schwarzer,

  Affiliation Institute for Medical Biometry and Statistics, Faculty of Medicine and Medical Center University of Freiburg, Germany

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• Patrick Oeller,

  Affiliation Cochrane Germany, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Germany

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• Laura Cabrera,

  Affiliation Cochrane Germany, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Germany

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• Erik von Elm,

  Affiliation Cochrane Switzerland, Institute of Social and Preventive Medicine (IUMSP), University Hospital Lausanne, Lausanne, Switzerland

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• Matthias Briel,

  Affiliation Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University of Basel and University Hospital Basel, Switzerland

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• Joerg J. Meerpohl,

  Affiliation Cochrane Germany, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Germany

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• on behalf of the OPEN consortium

  ¶The complete membership of the OPEN consortium can be found in the Acknowledgments.

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