Received: 4 June 2021
Accepted: 24 July 2021
First Online: 23 August 2021
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation. This study was approved by the medical ethics committee of Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University. Informed consent was obtained from all patients included in the study.
: Not applicable.
: The authors declare they have no competing interests.