Text and Data Mining valid from 2019-12-01
Received: 5 August 2019
Accepted: 2 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: The Ethics Committees of Orthopedic Hospital of Henan Province approved this study (2013016). Patients provided informed consent.
: All authors agree to publish this work.
: The authors declare that they have no competing interests.