Rajan, Sreekanth
Choi, Minjoo
Nguyen, Quoc Toan
Ye, Hong
Liu, Wei
Toh, Hui Ting
Kang, CongBao
Kamariah, Neelagandan
Li, Chi
Huang, Huiya
White, Carl
Baek, Kwanghee
GrĂ¼ber, Gerhard
Yoon, Ho Sup
Article History
Received: 2 December 2014
Accepted: 21 April 2015
First Online: 29 May 2015
Competing interests
: The authors declare no competing financial interests.