Funding for this research was provided by:
Key Research and Development Support Programmes of Chengdu Science and Technology Bureau (2018-YFYF-00123-SN)
the Fundamental Research Funds for the Central Universities (2012017yjsy118)
Text and Data Mining valid from 2019-11-08
Received: 22 May 2019
Accepted: 1 November 2019
First Online: 8 November 2019
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by the Ethics Committee of West China Hospital (2018 (146)) and was registered at chictr.org (ChiCTR1800017895).
: Informed consent was obtained from all individual participants included in the study.