Kyong-Jee Kim1, Youngjoon Kang2, Giwoon Kim3. 1. a Department of Medical Education , Dongguk University School of Medicine , 32 Dongguk-ro, Ilsandong-gu , Goyang - si , Gyeonggi-do 410-820 , Korea ; 2. b Department of Medical Education , Jeju National University School of Medicine , Jeju , Korea ; 3. c Department of Emergency Medicine , Sooncheonhyang University School of Medicine , Bucheon , Korea.