Hanks, Timothy D.
Kopec, Charles D.
Brunton, Bingni W.
Duan, Chunyu A.
Erlich, Jeffrey C.
Brody, Carlos D.
Article History
Received: 5 March 2014
Accepted: 12 November 2014
First Online: 19 January 2015
Competing interests
: The authors declare no competing financial interests.