1. Novozymes A/S, Medical Centre, 2880 Bagsværd, Denmark
2. Arthroscopic Centre Amager & Gait Analysis Laboratory, Copenhagen University Hospital, 2650 Hvidovre, Denmark
3. Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 2100 Copenhagen, Denmark
4. Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5000 Odense, Denmark
5. National Research Centre for the Working Environment, 2100 Copenhagen, Denmark