Lyoo, I K
Yoon, S
Kim, T S
Lim, S M
Choi, Y
Kim, J E
Hwang, J
Jeong, H S
Cho, H B
Chung, Y A
Renshaw, P F
Article History
Received: 31 March 2014
Revised: 13 November 2014
Accepted: 8 December 2014
First Online: 10 February 2015
Competing interests
: Professor IK Lyoo has received research support from Lundbeck, Eli Lilly, AstraZeneca, GSK, Nongshim and Pulmuone Holdings and Professor PFR has been a consultant for Ridge Diagnostics and Kyowa Hakko. The other authors declare no conflict of interest.