Kim, Ji Hong
Lee, Yeon Hee
Lim, Beom Jin
Jeong, Hyeon Joo
Kim, Pyung Kil
Shin, Jae Il
Article History
Received: 13 July 2015
Accepted: 14 January 2016
First Online: 7 March 2016
Competing interests
: This research was supported by a faculty research grant from Yonsei University College of Medicine for 2011 (6 -2011-0092).