- Correspondence to Professor Byeongjo Chun, Department of Emergency Medicine, Chonnam National University Medical School, Hak Dong 8, Donggu, Gwangju 501-747, South Korea;
- Received July 22, 2014
- Revised October 1, 2014
- Accepted October 29, 2014
- First published November 14, 2014.
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