Hidden changes to prespecified primary outcomes of clinical trials completed between 2009 and 2017 in German University Medical Centres: A meta-research study https://www.medrxiv.org/content/10.1101/2023.02.20.23286182
Hidden changes to prespecified primary outcomes of clinical trials completed between 2009 and 2017 in German University Medical Centres: A meta-research study https://www.medrxiv.org/content/10.1101/2023.02.20.23286182