Affiliation: | 1.Department of Orthopaedic Surgery,Washington University School of Medicine,St. Louis,USA;2.Department of Orthopaedic Surgery, Duke Orthopaedic, Cellular, Developmental and Genome Laboratories,Duke University School of Medicine,Durham,USA;3.Department of Cell Biology,Duke University School of Medicine,Durham,USA;4.Department of Developmental Biology,Washington University School of Medicine,St. Louis,USA |