1. Department of Occupational Therapy, Institute of Medwifery and Therapy, University College Copenhagen, Sigurdsgade 26, DK-2200 N Copenhagen, Denmark
2. Department of Public Health, University of Southern Denmark, JB Winsløwsvej 9A, 5000 Odense, Denmark
3. Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark