Received: 3 April 2020
Accepted: 17 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Xijing Hospital, and it conformed to the ethics guidelines of the Declaration of Helsinki. All the written consents were signed voluntarily and obtained online by all adult subjects or if subjects were under 18, by a legal guardian for inclusion before subjects started answering the questions.
: Not applicable.
: The authors declare that they have no competing interests.