1. Institute of Sports MedicineDepartment of Orthopaedic SurgeryBispebjerg HospitalCopenhagenDenmark
2. Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
3. Musculoskeletal Rehabilitation Research UnitDepartment of Physical TherapyBispebjerg HospitalCopenhagenDenmark
4. Centre for Medical GeneticsUniversity HospitalGhentBelgium
5. Department of RheumatologyRigshospitaletCopenhagenDenmark