Du, Dijun
Wang, Zhao
James, Nathan R.
Voss, Jarrod E.
Klimont, Ewa
Ohene-Agyei, Thelma
Venter, Henrietta
Chiu, Wah
Luisi, Ben F.
Article History
Received: 3 September 2013
Accepted: 5 March 2014
First Online: 20 April 2014
Competing interests
: The authors declare no competing financial interests.