Funding for this research was provided by:
National Natural Science Foundation of China (81301093)
Text and Data Mining valid from 2020-01-03
Received: 10 October 2019
Accepted: 29 December 2019
First Online: 3 January 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of West China Hospital, Sichuan University. All participants provided written informed consent before being enrolled in the study.
: As part of their written informed consent to participate in this study, subjects also consented to the publication of their anonymized data for research purposes.
: The authors declare that they have no competing interests.