Li, Baoe
Sun, Zhenghao
Zhao, Yan
Tian, Yuan
Tan, Taizhe
Gao, Fan
Li, Jingde
Funding for this research was provided by:
Natural Science Foundation of Hebei Province of China (E2017202032)
Technology Foundation for returned overseas Chinese scholars (C2015003038)
Article History
Received: 1 July 2018
Accepted: 16 December 2018
First Online: 28 December 2018
Compliance with ethical standards
: All relevant ethical standards were satisfied.
: The authors declare that they have no conflict of interest.