Funding for this research was provided by:
National Natural Science Foundation of China (81874002)
Received: 17 June 2019
Accepted: 20 September 2019
First Online: 18 October 2019
Ethics approval and consent to participate
: This study has been approved by the internal research administration department and the ethical committee of West China hospital. The clinical study was performed in accordance with the Declaration of Helsinki on ethical principles for medical research involving human subjects. We have obtained written consent to participate from the participants.
: Not applicable.
: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.