[1] Chonbuk Natl Univ, Res Inst Clin Med, Dept Emergency Med, Jeonju Si, South Korea
[2] Chonbuk Natl Univ Hosp, Biomed Res Inst, Jeonju Si, South Korea
[3] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Emergency Med, 88,Olymp Ro 43 Gil, Seoul 05505, South Korea