1. Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg C, Denmark
2. Department of Physiotherapy and Occupational Therapy, The Research and Implementation Unit PROgrez, Næstved-Slagelse-Ringsted Hospitals, Slagelse, Denmark
3. Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, Odense, Denmark
4. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark