Received: 28 March 2021
Accepted: 3 June 2021
First Online: 12 June 2021
: Ethical approval was obtained from the Ethical Committee of Dalian Medical University. Written informed consent was obtained from each participant in the study. Patients were informed of the purpose of the study and how the results would be presented prior to participating in the study, and were assured that all information they provided would be confidential.
: Not applicable.
: The authors declare that they have no competing interests.