1. Hyogo Prefectural Amagasaki General Medical Center; Hospital Care Research Unit; Higashi-Naniwa-Cho 2-17-77 Amagasaki Hyogo Hyogo Japan 606-8550
2. School of Public Health in the Graduate School of Medicine, Kyoto University; Department of Healthcare Epidemiology; Yoshida Konoe-cho, Sakyo-ku Kyoto Japan 606-8501
3. Shimane University; Department of Mathematics; 1060 Nishikawatsu cho Matsue 690-8504 Japan
4. Monash University; Australian and New Zealand Intensive Care Research Centre, Department of Epidemiology and Preventive Medicine; Melbourne VIC Australia
5. Fukushima Medical University; Center for Innovative Research for Communities and Clinical Excellence (CiRC2LE); 1 Hikarigaoka Fukushima Fukushima Japan 960-1295
6. Shiga University of Medical Science Hospital; Department of Anesthesia; Seta-Tsukinowa-cho Otsu Shiga Japan 520-2192
7. Hyogo Prefectural Amagasaki General Medical Center; Department of Respiratory Medicine; 2-17-77, Higashi-Naniwa-Cho Amagasaki Hyogo Japan 660-8550