1. Department of Orthopedics/Sports Medicine and Joint Surgery, the First Hospital of China Medical University,Liaoning,Shenyang,China,110001

2. Department of Physical Medicine & Rehabilitation, Perelman School of Medicine, University of Pennsylvania, Philadelphia,PA,USA,19146

3. Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia,PA,USA,19104

4. Department of Orthopedics, University of Maryland School of Medicine, Baltimore,MD,USA,21201

5. School of Biomedical Engineering, Science & Health Systems, Drexel University, Philadelphia,PA,USA,19104

6. Department of Orthopedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia,PA,USA,19104

7. Section of Rehabilitation Medicine, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia,PA,USA,19104