1. R. Clijsen, PhD, Department of Health Sciences, University of Applied Sciences and Arts of Southern Switzerland, Weststrasse 8, CH-7302 Landquart, Switzerland, and Health Department, University College Physiotherapy, “Thim van der Laan,” Landquart, Switzerland.
2. J. Fuchs, PT, Health Department, University College Physiotherapy, “Thim van der Laan,” Landquart, Switzerland.
3. J. Taeymans, PhD, Health Department, Bern University of Applied Sciences, Bern, Switzerland.