Xu, J
Eriksson, S E
Cebula, M
Sandalova, T
Hedström, E
Pader, I
Cheng, Q
Myers, C R
Antholine, W E
Nagy, P
Hellman, U
Selivanova, G
Lindqvist, Y
Arnér, E S J
Article History
Received: 6 October 2014
Revised: 19 November 2014
Accepted: 3 December 2014
First Online: 22 January 2015
Competing interests
: The authors declare no conflict of interest.