Preparing the Heart for Duty: Virtual Reality Biofeedback in an Arousing Action Game Improves in-Action Voluntary Heart Rate Variability Control in Experienced Police. - Abele Michela; Jacobien M. van Peer; Robert Oostenveld; Wendy Dorrestijn; Annika S. Smit; Isabela Granic; Karin Roelofs; Floris Klumpers (IEEE Trans. Affect. Comput., 2026)