Funding for this research was provided by:
National High-tech Research and Development Program (2012AA02A510, Beijing, China)
National Natural Science Foundation of China (81370219 and 81400267, Beijing, China)
Text and Data Mining valid from 2020-05-01
Received: 11 December 2019
Accepted: 22 April 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: The study protocol was approved by the institutional review boards of West China Hospital, Sichuan University, with a waiver of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.