Published on in Vol 8, No 11 (2020): November
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/20465, first published
.
![Sleep Tracking of a Commercially Available Smart Ring and Smartwatch Against Medical-Grade Actigraphy in Everyday Settings: Instrument Validation Study Sleep Tracking of a Commercially Available Smart Ring and Smartwatch Against Medical-Grade Actigraphy in Everyday Settings: Instrument Validation Study](https://asset.jmir.pub/assets/1f63f3a6a9007c9b1205460ded4c9cd3.png 480w,https://asset.jmir.pub/assets/1f63f3a6a9007c9b1205460ded4c9cd3.png 960w,https://asset.jmir.pub/assets/1f63f3a6a9007c9b1205460ded4c9cd3.png 1920w,https://asset.jmir.pub/assets/1f63f3a6a9007c9b1205460ded4c9cd3.png 2500w)
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