1. Department of Health and Behavioral Sciences, Friedensau Adventist University, An der Ihle 19, 39291 Friedensau, Germany
2. Faculty of Medicine, University of British Columbia, 2206 East Mall, Vancouver, BC, Canada V6T 1Z3
3. Freiburg Institute for Musicians' Medicine, Medical School of University of Freiburg, Breisacher Straße 60, 79106 Freiburg, Germany