Received: 14 April 2021
Accepted: 29 June 2021
First Online: 9 July 2021
: All patients gave written informed consent, and the study was carried out in accordance with ethical standards. The study was approved by the Ethics Committee of Haidian Hospital. All participants provided written informed consent prior to enrolment. When the patient was unable to provide consent because of consciousness disturbance, the next of kin provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.