Contribution to authorship
HBQ and NS contributed to the study design. YY, LC and JNX collected
data. YY and QJD analyzed data and wrote this manuscript. XL and CT
provided some advice on data analysis and helped editing this
manuscript. HBQ and NS revised the manuscript and are corresponding
authors of this study. All authors made substantial contributions to the
paper and read and approved the final manuscript.
Details of ethics approval
The study was approved by the ethics committee of the First
Affiliated Hospital of Chongqing Medical University on 1 December 2019
(NO.20198101). An electronic informed consent was obtained before
completing the questionnaire.