1. Department of Orthopaedic Surgery; the Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
2. Department of Plastic and Reconstructive Surgery; the Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
3. Department of Periodontology; Faculty of Dentistry; Prince Philip Dental Hospital; The University of Hong Kong; China
4. Department of Orthopedic Surgery; Shenzhen Hospital of Southern Medical University; China