1. Orthopedic Research Laboratory, Department of Orthopedics
2. Institute of Experimental Clinical Research, Skejby Hospital
3. Aarhus University Hospital, Department of Orthopedics, Aarhus Amtssygehus
4. Department of Pathology, Aarhus Amtssygehus
5. Department of Orthopedics, Odense University Hospital, Denmark