Wilzeck, Verena C., Janik Hufschmid, Louis Bischof, Christopher Hansi, Matthias P. Nägele, Juerg H. Beer, and Urs Hufschmid. “A Significant Increase in Exercise Test Performance With Virtual Group Motivation: A Randomised Open-Label Controlled Trial”. Swiss Medical Weekly 150, no. 2930 (July 15, 2020): w20287. Accessed April 26, 2024. https://smw.ch/index.php/smw/article/view/2829.