Harris, William M.
Lombardo, Jeffrey J.
Nelson, George J.
Lai, Barry
Wang, Steve
Vila-Comamala, Joan
Liu, Mingfei
Liu, Meilin
Chiu, Wilson K. S.
Article History
Received: 27 August 2013
Accepted: 23 May 2014
First Online: 10 June 2014
Competing interests
: The authors declare no competing financial interests.