Sun, Liping
Tu, Huakang
Chen, Tiejun
Yuan, Quan
Liu, Jingwei
Dong, Nannan
Yuan, Yuan
Article History
Received: 27 February 2017
Accepted: 1 September 2017
First Online: 14 September 2017
Competing Interests
: The research funders had no influence on the design of the study; the collection, analysis, and interpretation of the data; the decision to submit the manuscript for publication; or the writing of the manuscript.