Xie, Hui
Cui, Zhuang
Wang, Long
Xia, Zhuying
Hu, Yin
Xian, Lingling
Li, Changjun
Xie, Liang
Crane, Janet
Wan, Mei
Zhen, Gehua
Bian, Qin
Yu, Bin
Chang, Weizhong
Qiu, Tao
Pickarski, Maureen
Duong, Le Thi
Windle, Jolene J
Luo, Xianghang
Liao, Eryuan
Cao, Xu
Article History
Received: 15 May 2014
Accepted: 18 July 2014
First Online: 5 October 2014
Competing interests
: M.P. and L.T.D. are employees of Merck & Co. They own stocks and stock options from this company.