Sang, Fuming
Zhang, Xue
Shen, Fengyi
Funding for this research was provided by:
National Natural Science Foundation of China (21407035)
Natural Science Foundation of Shandong Province (ZR2014BM021)
Secretaria de Desenvolvimento Econômico, Ciência, Tecnologia e Inovação (2014DXGJ15)
Article History
Received: 11 December 2018
Accepted: 10 April 2019
First Online: 23 May 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.