[1] Eastern Chiba Medical Center,Department of General Internal Medicine
[2] Chiba University,Department of General Medical Science, Graduate School of Medicine
[3] University of Tsukuba,Department of Health Services Research, Faculty of Medicine
[4] David Geffen School of Medicine at University of California,Division of General Internal Medicine and Health Services Research, Department of Medicine
[5] Los Angeles,Geriatric Research, Education and Clinical Center and HSR&D Center for Healthcare Innovation, Implementation and Policy
[6] Veterans Affairs Greater Los Angeles Healthcare System,Division of Geriatrics, Department of Medicine
[7] David Geffen School of Medicine at University of California,undefined
[8] Los Angeles,undefined
[9] Health Unit,undefined
[10] RAND Corporation,undefined