[1] Boston VA Hlth Care Syst, Womens Hlth Clin, Gen Internal Med Sect, Boston, MA 02130 USA
[2] Boston VA Hlth Care Syst, Normat Aging Study, Boston, MA 02130 USA
[3] Vet Affairs Med Ctr, Ctr Hlth Qual Outcomes & Econ Res, Bedford, MA USA
[4] Boston Univ, Sch Med, Boston, MA 02215 USA
[5] Boston Univ, Sch Publ Hlth, Boston, MA 02215 USA
[6] Boston Univ, Dept Math, Boston, MA 02215 USA
[7] Tufts Univ New England Med Ctr, Hlth Inst, Boston, MA 02111 USA
[8] Ctr Beneficiary Choices, Ctr Medicare Serv, Baltimore, MD USA
[9] Ctr Beneficiary Choices, Ctr Medicaid Serv, Baltimore, MD USA
[10] Univ Maryland Baltimore Cty, Policy Sci Grad Program, Baltimore, MD 21228 USA