[1] Harry S Truman Mem Vet Hosp, Hlth Serv Res & Dev Program, Columbia, MO 65201 USA
[2] Univ Missouri, Sch Med, Dept Hlth Management & Informat, Columbia, MO USA
[3] Univ Missouri, Sch Med, Ctr Hlth Care Qual, Columbia, MO USA
[4] Grp Hlth Cooperat Puget Sound, Ctr Hlth Studies, Seattle, WA 98101 USA
[5] Ctr Dis Control & Prevent, Div Diabet Translat, Atlanta, GA USA