1. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , Shanghai 200438, China
2. Department of Radiology, The Second Medical Center & National Clinical Research Center for Geriatric Diseases , Chinese PLA General Hospital, Beijing 100853, China
3. Institute of Orthopedics, The First Medical Center, Chinese PLA General Hospital, Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries of PLA, Beijing 100853 , China
4. Institute for Medical Device Control, National Institutes for Food and Drug Control, Beijing 102629 , China