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Three out of four published systematic reviews on COVID-19 treatments were not registered and one-third of those registered were published: a meta-research study.

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Title: Three out of four published systematic reviews on COVID-19 treatments were not registered and one-third of those registered were published: a meta-research study.
Authors: Siemens W; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany. Electronic address: siemens@ifem.uni-freiburg.de., Nothacker J; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany., Stadelmaier J; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany., Meerpohl JJ; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany., Schmucker C; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
Source: Journal of clinical epidemiology [J Clin Epidemiol] 2022 Dec; Vol. 152, pp. 36-46. Date of Electronic Publication: 2022 Sep 27.
Publication Type: Meta-Analysis; Journal Article
Journal Info: Publisher: Elsevier Country of Publication: United States NLM ID: 8801383 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1878-5921 (Electronic) Linking ISSN: 08954356 NLM ISO Abbreviation: J Clin Epidemiol Subsets: MEDLINE
Database: MEDLINE Ultimate
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  Data: <searchLink fieldCode="AU" term="%22Siemens+W%22">Siemens W</searchLink>; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany. Electronic address: siemens@ifem.uni-freiburg.de.<br /><searchLink fieldCode="AU" term="%22Nothacker+J%22">Nothacker J</searchLink>; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.<br /><searchLink fieldCode="AU" term="%22Stadelmaier+J%22">Stadelmaier J</searchLink>; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.<br /><searchLink fieldCode="AU" term="%22Meerpohl+JJ%22">Meerpohl JJ</searchLink>; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany.<br /><searchLink fieldCode="AU" term="%22Schmucker+C%22">Schmucker C</searchLink>; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
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  Data: <searchLink fieldCode="JN" term="%228801383%22">Journal of clinical epidemiology</searchLink> [J Clin Epidemiol] 2022 Dec; Vol. 152, pp. 36-46. <i>Date of Electronic Publication: </i>2022 Sep 27.
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              Text: 2022 Dec
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