Received: 3 November 2020
Accepted: 19 March 2021
First Online: 9 April 2021
: Informed consent was obtained from all participants, and all methods were performed in accordance with the relevant guidelines and regulations. This study was approved by the Biomedical Ethics Committee of West China Hospital, Sichuan University (ID: 2019–686).
: All authors have approved the manuscript and agree with submission to the BMC Family Practice.
: The authors declare that they have no competing interests.