1. Department of Orthopaedic Surgery, University of California , Davis, CA 95817 , United States
2. Department of Pathology, Stanford University School of Medicine , Stanford, CA 94305 , United States
3. Department of Pathology and Laboratory Medicine, Weill Cornell Medical College , New York, NY 10065 , United States
4. Research Division, Hospital for Special Surgery , New York, NY 10021 , United States