1. Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA, USA
2. Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
3. Department of Orthopaedics, Trauma and Plastic Surgery, University Hospital Leipzig, Germany
4. Department of Orthopaedic Surgery, Scripps Clinic, La Jolla, CA, USA