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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 | 48 |
| January 2025 | February 2025 | March 2025 | April 2025 | May 2025 | June 2025 | July 2025 | |
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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 | 1 | 3 | 3 | 2 | 2 | 4 | 0 |
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| 2023_Holst_etal.pdf | 74 |
