Cai, Yifeng
Ma, Shoubao
Liu, Yuejun
Gong, Huanle
Cheng, Qiao
Hu, Bo
Wu, Yan
Yu, Xiao
Dong, Chen
Sun, Kai
Wu, Depei
Liu, Haiyan
Article History
Received: 7 December 2015
Revised: 29 April 2016
Accepted: 23 May 2016
First Online: 17 October 2016
Competing interests
: CD has honoraria from the Speakers Bureau of Bristol-Myers Squibb and is a consultant/advisory board member of GlaxoSmithKline. The remaining authors declare no conflict of interest.