Published on in Vol 5, No 1 (2020): Jan-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16620, first published
.
![A Contact-Free, Ballistocardiography-Based Monitoring System (Emfit QS) for Measuring Nocturnal Heart Rate and Heart Rate Variability: Validation Study A Contact-Free, Ballistocardiography-Based Monitoring System (Emfit QS) for Measuring Nocturnal Heart Rate and Heart Rate Variability: Validation Study](https://asset.jmir.pub/assets/30fe87925a7387b36531d3e00fb879c8.png 480w,https://asset.jmir.pub/assets/30fe87925a7387b36531d3e00fb879c8.png 960w,https://asset.jmir.pub/assets/30fe87925a7387b36531d3e00fb879c8.png 1920w,https://asset.jmir.pub/assets/30fe87925a7387b36531d3e00fb879c8.png 2500w)
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