An Augmented Reality Device for Remote Supervision of Ultrasound Examinations in International Exercise Science Projects: Usability Study. - Rigamonti, Lia; Secchi, Matteo; Lawrence, Jimmy B; Labianca, Luca; Wolfarth, Bernd; Peters, Harm; Bonaventura, Klaus; Back, David Alexander (Journal of Medical Internet Research, 2021)