Jin, P
Civini, S
Zhao, Y
De Giorgi, V
Ren, J
Sabatino, M
Jin, J
Wang, H
Bedognetti, D
Marincola, F
Stroncek, D
Article History
Received: 28 January 2014
Revised: 18 March 2014
Accepted: 9 April 2014
First Online: 8 May 2014
Competing interests
: The authors declare no conflict of interest.