Received: 29 November 2019
Accepted: 22 April 2020
First Online: 7 May 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Sichuan Orthopedic Hospital. Written informed consent was obtained from each patient.
: Written informed consent for publication were obtained from patient #1 and patient #2.
: All authors declare that they have no conflict of interest.