Liu, Yang
Xu, Kai
Wu, Shaohui
Qin, Mu
Liu, Xu
Funding for this research was provided by:
Shanghai Sailing Program (20YF1444300)
Article History
Received: 31 October 2021
Accepted: 23 February 2022
First Online: 8 April 2022
Declarations
:
: The central ethics committee of Yuhuan second people's hospital and the central ethics committee of Shanghai Chest Hospital Affiliated to Shanghai Jiao Tong University approved the study protocol of the survey. Every enrolled subject provided a written consent, if the participant was disabled, his/her relatives provided the written consent.
: Every participant provided a written consent to publish their information collected by this survey, excluding their name and ID number.
: The authors declare no competing interests.