1. Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, PR China
2. Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, PR China
3. La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
4. Salk Institute for Biological Studies, La Jolla, CA, USA