Article History
Received: 5 February 2020
Accepted: 14 July 2020
First Online: 17 July 2020
Ethics approval and consent to participate
: This study was carried out in accordance with The Code of Ethics of the World Medical Association (Declaration of Helsinki). All patients signed the informed consent, and this study was approved by the ethics committees of Beijing Chao-Yang Hospital.
: Not applicable.
: The authors declare that they have no competing interests.