[1] Univ Illinois, Sch Publ Hlth, Div Community Hlth Sci, Chicago, IL 60680 USA
[2] Edward Hines Jr VA Med Ctr, Ctr Innovat Chron & Complex Healthcare, Hines, IL USA
[3] John H Stroger Jr Hosp Cook Cty, Dept Internal Med, Chicago, IL USA
[4] Univ Illinois, Coll Appl Hlth Sci, Dept Biomed & Hlth Informat Sci, Chicago, IL USA