Received: 17 September 2020
Accepted: 13 January 2021
First Online: 29 January 2021
Ethics approval and consent to participate
: This study was approved by the Committee on Human Experimentation of China Medical University (YDJK2020022). The study process was in accordance with the ethical standards. This study gained informed consent from all the participants. The data obtained was kept confidential and anonymous to protect their privacy.
: Not applicable.
: The authors declare that they have no competing interests.