Vollert, J. O., Störk, T., Rose, M., & Möckel, M. (2003). Music as Ad-juvant Therapy for Coronary Heart Disease. Therapeutic Music Lowers Anxiety, Stress and Beta-Endorphin Concentrations in Patients from a Coronary Sport Group. Deutsche Medizinische Wochenschrift (1946), 128, 2712-2716.