Received: 29 March 2021
Accepted: 13 July 2021
First Online: 2 August 2021
: This study has been approved by the Ethics Committee of Special Medical Center of Chinese Armed Police Force in accordance with the Helsinki Declaration. All the patients had been informed about the rights and obligations in this study and signed in informed consent before took part in.
: Not applicable.
: The authors declare that they have no competing interests.