WebPPG: Feasibility and Usability of Self-Performed, Browser-Based Smartphone Photoplethysmography. - Michael Nissen; Madeleine Flaucher; Katharina M. Jaeger; Hanna Huebner; Nina Danzberger; Adriana Titzmann; Constanza A. Pontones; Peter A. Fasching; Bjoern M. Eskofier; Heike Leutheuser (EMBC, 2023)