Li, Song
Hou, Huayan
Mori, Takashi
Sawmiller, Darrell
Smith, Adam
Tian, Jun
Wang, Yanjiang
Giunta, Brian
Sanberg, Paul R.
Zhang, Sheqing
Tan, Jun
Article History
Received: 27 January 2015
Accepted: 14 May 2015
First Online: 19 June 2015
Competing interests
: The authors declare no competing financial interests.