1. Umeå University, Department of Integrative Medical Biology, Section for Anatomy, Umeå, Sweden
2. Winternet, Boden, Sweden
3. Centre for Musculoskeletal Research, University of Gävle, Umeå, Sweden
4. Umeå University, Department of Public Health and Clinical Medicine, Section for Medicine, Umeå, Sweden
5. Umeå University, Department of Chemistry, Section for Organic Chemistry, Umeå, Sweden
6. Umeå University, Department of Surgical and Preoperative Sciences, Section for Sports Medicine, Umeå, Sweden