Shi, Weiping
Yu, Shengwen
Funding for this research was provided by:
National Science Fund of China (91420234)
Article History
First Online: 18 January 2019
Compliance with ethical standards
:
: Weiping Shi declares that he has no conflict of interest. Shengwen Yu declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.