Liu, Weilin http://orcid.org/0000-0002-7486-6697
Li, Ming http://orcid.org/0000-0001-8959-9619
Guzzon, Robert S.
Norberg, Erik J.
Parker, John S.
Lu, Mingzhi
Coldren, Larry A.
Yao, Jianping
Article History
Received: 7 April 2015
Accepted: 28 December 2015
First Online: 15 February 2016
Competing interests
: The authors declare no competing financial interests.