- Correspondence to Professor Kwang Je Baek, Department of Emergency Medicine, Konkuk University Medical Center, Konkuk, University School of Medicine, 4-12 Hwayang-dong, Gwangjin-gu, Seoul 143-729, Korea;
- Accepted 5 March 2012
- Published in print 1 April 2013.
- Published online 19 March 2013.
- Published first 13 April 2012.
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