1. Department of Orthopaedics and Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, USA.
2. Department of Biology, University of Rochester, Rochester, NY 14642, USA.
3. Department of Orthopaedic Surgery, Duke Orthopaedic Cellular, Developmental, and Genome Laboratories, Duke University School of Medicine, Durham, NC 27710, USA.
4. Department of Pathology and Laboratory Medicine, University of Rochester, Rochester, NY 14642, USA.
5. Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.