Cheuk-Kwan Sun1, Kuo-Chuan Hung2. 1. Department of Emergency Medicine, E-Da Hospital, School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan. 2. Department of Anesthesiology, Chi Mei Medical Center, No. 901, ChungHwa Road, YungKung Dist, Tainan, 71004, Taiwan. ed102605@gmail.com.