Funding for this research was provided by:
National Natural Science Foundation of China (81701665, 81501942, 81500754)
Fundamental Research Funds for the Central Universities (WK2100230016)
Received: 8 April 2019
Accepted: 13 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: This study complied with the Declaration of Helsinki and was approved by the University of Science and Technology of China’s Research Ethics Committee (ID:USTCEC201200006). A written informed consent was obtained from each participant after explanation of the nature and possible consequences of the study.
: All study subjects gave informant consent.
: The author(s) declare no potential competing interest with respect to the research, authorship, and/or publication of this article.