Li, Zhenjiang
Yin, Jifang
Gao, Chenghai
Sheng, Liying
Meng, Alan
Funding for this research was provided by:
National Natural Science Foundation of China (No.51672144, 51572137, 51502149, 51702181)
Natural Science Foundation of Shandong Province (No. ZR2016EMB25, ZR2017PEM006, ZR2017BB013)
Higher Educational Science and Technology Program of Shandong Province (No.J16LA10, J17KA014)
Article History
Received: 18 October 2018
Accepted: 23 December 2018
First Online: 10 January 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.