A Pilot Study of a Three-Session Heart Rate Variability Biofeedback Intervention for Veterans with Posttraumatic Stress Disorder. - Schuman, Donna L.; Lawrence, Karen A.; Boggero, Ian; Naegele, Peter; Ginsberg, J. P.; Casto, Ashley; Moser, Debra K. (Applied Psychophysiology & Biofeedback, 2023)