Liu, Xianchen http://orcid.org/0000-0003-0411-1050
Yang, Yanyun
Liu, Zhen-Zhen
Luo, Yachen
Fan, Fang
Jia, Cun-Xian
Funding for this research was provided by:
National Natural Science Foundation of China (81573233)
Article History
Received: 15 March 2019
Accepted: 22 May 2019
First Online: 1 June 2019
Compliance with ethical standards
:
: All authors have no conflict of interest.
: This study was approved by the research ethics committee of Shandong University and has, therefore, been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.