Li, X
Liu, Y
Granberg, K J
Wang, Q
Moore, L M
Ji, P
Gumin, J
Sulman, E P
Calin, G A
Haapasalo, H
Nykter, M
Shmulevich, I
Fuller, G N
Lang, F F
Zhang, W
Article History
Received: 9 January 2014
Revised: 4 March 2014
Accepted: 7 March 2014
First Online: 21 April 2014
Competing interests
: The authors declare no conflict of interest.