[1] Univ Basel, Univ Basel Hosp, Osteoarthritis Res Ctr Basel, Dept Orthopaed, CH-4031 Basel, Switzerland
[2] Univ Utah, Univ Orthopaed Ctr, Harold K Dunn Orthopaed Res Lab, Salt Lake City, UT 84108 USA
[3] Univ Basel, Univ Basel Hosp, Dept Orthopaed, CH-4031 Basel, Switzerland
[4] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, Boston, MA 02215 USA