T Ikegami1, A Kuriyama2, S Matsukubo3. 1. Department of Emergency Medicine, Kurashiki Central Hospital, 1-1-1 Miwa Kurashiki Okayama, Kurashiki, Okayama 710-8602, Japan nrk40448@nifty.com. 2. Department of General Medicine, Kurashiki Central Hospital, 1-1-1 Miwa Kurashiki Okayama, Kurashiki, Okayama 710-8602, Japan. 3. Department of Emergency Medicine, Kurashiki Central Hospital, 1-1-1 Miwa Kurashiki Okayama, Kurashiki, Okayama 710-8602, Japan.