German, P
Bai, S
Liu, X-D
Sun, M
Zhou, L
Kalra, S
Zhang, X
Minelli, R
Scott, K L
Mills, G B
Jonasch, E
Ding, Z
Article History
Received: 27 May 2015
Revised: 3 December 2015
Accepted: 12 January 2016
First Online: 14 March 2016
Competing interests
: The authors declare no conflict of interest.