[1] Edward Hines Jr VA Hosp, Ctr Innovat Complex Chron Healthcare, Dept Vet Affairs DVA, Hines, IL 60141 USA
[2] Edward Hines Jr VA Hosp, Dept Vet Affairs DVA, Ctr Evaluat Practices & Experiences Patient Ctr C, Hines, IL USA
[3] Vet Affairs Cent Off, Primary Care Serv, Office Patient Care Serv, Washington, DC USA
[4] Med Coll Wisconsin, Dept Med, Milwaukee, WI 53226 USA
[5] Northwestern Univ, Ctr Healthcare Studies, Inst Publ Hlth & Med Gen Internal Med & Geriatr, Feinberg Sch Med, Chicago, IL 60611 USA