Kong, Weisu
Tan, Qingqing
Guo, Haiyu
Sun, Han
Qin, Xia
Qu, Fengli http://orcid.org/0000-0001-6311-3051
Funding for this research was provided by:
National Natural Science Foundation of China (21775089)
Outstanding Youth Foundation of Shandong Province (ZR2017JL010)
Project of Shandong Province Higher Educational Science and Technology Program (J18KA101)
Key Research and Development Program of Jining City (2018ZDGH032)
Article History
Received: 11 October 2018
Accepted: 14 December 2018
First Online: 9 January 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.