[1] Johns Hopkins Wilmer Eye Inst, Dana Ctr Prevent Ophthalmol, Baltimore, MD USA
[2] Johns Hopkins Univ, Ctr Aging & Hlth, Baltimore, MD USA
[3] Univ Kentucky, Coll Med, Lexington, KY 40506 USA
[4] Johns Hopkins Univ, Div Geriatr Med & Gerontol, Sch Med, Baltimore, MD USA
[5] Johns Hopkins Univ, Sch Med, Wilmer Eye Inst, Lions Vis Res & Rehabil Ctr, Baltimore, MD 21205 USA
[6] Univ Michigan, Ctr Eye Policy & Innovat, Dept Ophthalmol & Visual Sci, Ann Arbor, MI 48109 USA
[7] Univ Michigan, Inst Hlth Care Policy & Innovat, Ann Arbor, MI 48109 USA
[8] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Hlth Policy & Management, Baltimore, MD USA
[9] Johns Hopkins Bloomberg Sch Publ Hlth, Roger C Lipitz Ctr Integrated Hlth Care, Baltimore, MD USA