[1] Japanese Red Cross Musashino Hosp, Dept Emergency & Crit Care Med, Intens Care Unit, 1-26-1,Kyounanchou, Musashino, Tokyo 1808610, Japan
[2] Kameda Gen Hosp, Dept Intens Care Unit, 929 Higashi Cho, Kamogawa City, Chiba 2968602, Japan
[3] Keio Univ, Sch Med, Dept Prevent Med & Publ Hlth, Shinjuku Ku, 35 Shinanomachi, Tokyo 1608582, Japan
[4] Jichi Med Univ, Saitama Med Ctr, Dept Anesthesiol & Crit Care Med, Omiya Ku, 1-847,Amanuma Cho, Saitama, Saitama 3308503, Japan
[5] Keio Univ Hosp, Clin & Translat Res Ctr, Biostat Unit, 35 Shinanomachi, Tokyo 1608582, Japan
[6] Hiroshima Univ, Dept Emergency & Crit Care Med, Minami Ku, Kasumi 1-2-3, Hiroshima 7348551, Japan
[7] Yokohama City Minato Red Cross Hosp, Dept Intens Care Med, 3-12-1,Shin Yamashita, Yokohama, Kanagawa 2318682, Japan
[8] Kurashiki Cent Hosp, Emergency & Crit Care Ctr, Dept Emergency Med, 1-1-1 Miwa, Kurashiki, Okayama 7108602, Japan
[9] Jikei Univ, Sch Med, Dept Anesthesiol, Intens Care Unit, 3-19-18,Nishishimbashi, Tokyo 1058471, Japan
[10] Toyonaka City Hosp, Dept Anesthesia, 1-14-4,Shibaraha Chou, Toyonaka, Osaka 5608565, Japan
[11] Sendai City Hosp, Div Intens Care, Emergency & Crit Care Dept, Taihaku Ku, 1-1-1,Asutonaga Chou, Sendai, Miyagi 9828502, Japan
[12] Kobe City Med Ctr, Gen Hosp, Dept Emergency Med, 2-2-1,Minatojima Minamimachi, Kobe, Hyogo 6500047, Japan
[13] Natl Hosp Org Kyoto Med Ctr, Dept Emergency & Crit Care Med, Fushimi Ku, 1-1 Mukaihata Cho, Kyoto, Kyoto 6120861, Japan
[14] Fukuoka City Hosp, Dept Emergency Med, Hakata ku, 1-13,Yoshizuka Honmachi, Fukuoka, Fukuoka 8120046, Japan
[15] Nippon Med Sch, Chiba Hokusoh Hosp, Shock & Trauma Ctr, Chiba 2701694, Japan
[16] Okayama Med Ctr, Dept Anesthesiol, Kita Ku, 1711-1,Taeki, Okayama, Okayama 7011192, Japan
[17] Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Intens Care Med, 3-4-32,Toudaijima, Urayasu, Chiba 2790001, Japan
[18] Tohoku Med & Pharmaceut Univ Hosp, Div Infect Dis & Infect Control, Miyagino Ku, 1-12-1,Fukumuro, Sendai, Miyagi 9838512, Japan
[19] Saiseikai Kumamoto Hosp, Dept Acute Care & Gen Med, Minami Ku, 5-3-1,Chikami, Kumamoto, Kumamoto 8614193, Japan
[20] Takarazuka City Hosp, Dept Cent Lab & Infect Control, 4-5-1,Kohama, Takarazuka, Hyogo 6650827, Japan
[21] Jichi Med Univ, Dept Surg, 3311-1,Yakushiji, Simono, Tochigi 3290498, Japan