Funding for this research was provided by:
the Natural Science Foundation of China (21507089, 21575041, 21777041)
the Shanghai University Young Teacher Training Program (ZZyy15095)
the Scientific Research Foundation for the Introduction of Talent of Shanghai Institute of Technology (YJ2015-6)
Shanghai Pujiang Program (17PJD010)
Shanghai Municipal Education Commission
Article History
Received: 27 November 2018
Accepted: 4 February 2019
First Online: 15 February 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.