Zhang, Hao
Shao, Huanjie
Golubovskaya, Vita M
Chen, Hongbin
Cance, William
Adjei, Alex A
Dy, Grace K
Article History
Received: 15 January 2016
Revised: 29 April 2016
Accepted: 11 May 2016
First Online: 23 June 2016
Competing interests
: The authors declare no conflict of interest.