1 Department of Emergency Medicine, Veterans Health Service Medical Center, 53, Jinhwangdo-ro 61-gil, Gangdong-gu, Seoul 05368, Republic of Korea. Electronic address: akynei@naver.com.
2 Department of Emergency Medicine, Veterans Health Service Medical Center, 53, Jinhwangdo-ro 61-gil, Gangdong-gu, Seoul 05368, Republic of Korea.