TY - RPRT TI - Heart Rate Variability with Photoplethysmography in 8 Million Individuals: Results and Scaling Relations with Age, Gender, and Time of Day AU - Natarajan, A. AU - Emir-Farinas, H. AU - Pantelopoulos, A. AU - Natarajan, P. PY - 2019 DO - 10.1101/772285 UR - https://www.biorxiv.org/content/10.1101/772285v1 ID - 10.1101/772285 ER -