Published on in Vol 7, No 5 (2019): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13421, first published
.
![Validation of the Mobile App–Recorded Circadian Rhythm by a Digital Footprint Validation of the Mobile App–Recorded Circadian Rhythm by a Digital Footprint](https://asset.jmir.pub/assets/4958cfd3669234b98b9bfbcb0ce3aa0f.png 480w,https://asset.jmir.pub/assets/4958cfd3669234b98b9bfbcb0ce3aa0f.png 960w,https://asset.jmir.pub/assets/4958cfd3669234b98b9bfbcb0ce3aa0f.png 1920w,https://asset.jmir.pub/assets/4958cfd3669234b98b9bfbcb0ce3aa0f.png 2500w)
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