Article History
Received: 3 June 2020
Revised: 24 August 2020
Accepted: 21 October 2020
First Online: 9 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All authors consent to publish the paper.
: The study followed the tenets of the Declaration of Helsinki and its ethical standards of 1964. The study was approved by the Medical Ethics Committee of the Beijing Tongren Hospital.
: Written informed consent was obtained from all participants.