Funding for this research was provided by:
National Natural Science Foundation of China (81620108026, 81472924)
Fundamental Research Funds for the Central Universities (xjj2018154)
Article History
Received: 4 November 2018
Revised: 7 April 2019
Accepted: 16 April 2019
First Online: 6 May 2019
Compliance with ethical standards
: The ethics committee of Xi’an Jiaotong University has approved this study, and informed consent was obtained from all individual participants included in the study.
: None.