Department of Health Services Research, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Department of Emergency and Critical Care Medicine, National Hospital Organization Mito Medical Center, Ibarakimachi, Japan

Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan

Present affiliation: Department of Emergency and Critical Care Medicine, Tokai University School of Medicine, Isehara, Japan; Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo. Search for more papers by this author