Ling, H
Vincent, K
Pichler, M
Fodde, R
Berindan-Neagoe, I
Slack, F J
Calin, G A
Article History
Received: 15 October 2014
Revised: 3 December 2014
Accepted: 4 December 2014
First Online: 26 January 2015
Competing interests
: The authors declare no conflict of interest.