Funding for this research was provided by:
This research was funded by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (2015B001)
The Fujian Medical Innovation Project (2014-CX-18)
The Natural Science Foundation of Fujian Province of China (2015Y0020)
Article History
Received: 22 October 2017
Accepted: 14 June 2018
First Online: 28 June 2018
Conflicts of interest
: The authors declare that they have no conflicts of interest.