A comprehensive accuracy assessment of Samsung smartwatch heart rate and heart rate variability. - Sarhaddi, Fatemeh; Kazemi, Kianoosh; Azimi, Iman; Cao, Rui; Niela-Vilén, Hannakaisa; Axelin, Anna; Liljeberg, Pasi; Rahmani, Amir M. (PLoS ONE, 2022)