Funding for this research was provided by:
The Science and Technology program of Zhoushan (2017B31127)
Medical Science and Technology Foundation of Zhoushan (2017A01)
Article History
Received: 8 November 2018
Revised: 26 February 2019
Accepted: 28 February 2019
First Online: 8 March 2019
Conflict of interest
: Author Li Fang declares that he has no conflict of interest. Author Feng-mei Qiu declares that she has no conflict of interest. Author Xin-wei Yu declares that he has no conflict of interest