- Correspondence to Professor Daozhang Cai and Dr Xiaochun Bai, Department of Orthopedics, Academy of Orthopedics - Guangdong Province, Orthopedic Hospital of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China; ,
- Received March 21, 2018
- Revised June 12, 2018
- Accepted June 17, 2018
- First published July 10, 2018.
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