Asgari Mehrabadi, M. ., Azimi, I. ., Sarhaddi, F. ., Axelin, A. ., Niela-Vilen, H. ., Myllyntausta, S. ., … Rahmani, A. M. (2020). Sleep Tracking of a Commercially Available Smart Ring and Smartwatch Against Medical-Grade Actigraphy in Everyday Settings: Instrument Validation Study. JMIR MHealth and UHealth, 8(10), 1. http://doi.org/10.2196/20465