Jin, R
Yamashita, H
Yu, X
Wang, J
Franco, O E
Wang, Y
Hayward, S W
Matusik, R J
Article History
Received: 8 January 2014
Revised: 27 June 2014
Accepted: 4 August 2014
First Online: 15 September 2014
Competing interests
: The authors declare no conflict of interest.