Li, Z
Scott, M J
Fan, E K
Li, Y
Liu, J
Xiao, G
Li, S
Billiar, T R
Wilson, M A
Jiang, Y
Fan, J
Article History
Received: 28 August 2015
Revised: 24 January 2016
Accepted: 2 February 2016
First Online: 4 March 2016
Competing interests
: The authors declare no conflict of interest.