Article History
Received: 13 May 2020
Accepted: 10 August 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: This study complies with the Declaration of Helsinki. The Medical Ethics Committee of Tianjin First Central Hospital approved the study procedures and all participants provided written informed consent prior to study enrollment.
: Not applicable.
: The authors have no conflicts of interest to declare.