Published on in Vol 25 (2023)
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/43484, first published
.
![Data Challenges for Externally Controlled Trials: Viewpoint Data Challenges for Externally Controlled Trials: Viewpoint](https://asset.jmir.pub/assets/b597a90ff92f948d46ec9bf3b9c25616.png 480w,https://asset.jmir.pub/assets/b597a90ff92f948d46ec9bf3b9c25616.png 960w,https://asset.jmir.pub/assets/b597a90ff92f948d46ec9bf3b9c25616.png 1920w,https://asset.jmir.pub/assets/b597a90ff92f948d46ec9bf3b9c25616.png 2500w)
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