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Frequency of multiple changes to prespecified primary outcomes of clinical trials completed between 2009 and 2017 in German university medical centers: A meta-research study
Holst M,
Haslberger M,
Yerunkar S,
Strech D,
Hemkens LG,
et al.
(2023)
Frequency of multiple changes to prespecified primary outcomes of clinical trials completed between 2009 and 2017 in German university medical centers: A meta-research study.
PLOS Medicine 20(10): e1004306.
https://doi.org/10.1371/journal.pmed.1004306