1. Bern University of Applied Sciences, Department of Health, Bern, Switzerland
2. Akademie für integrative Physiotherapie und Trainingslehre, Grenzach-Wyhlen, Germany
3. School of Health Sciences, HES-SO Valais-Wallis, Sion, Switzerland
4. Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium