[1] Johns Hopkins Univ, Wilmer Eye Inst, Sch Med, Baltimore, MD USA
[2] Johns Hopkins Univ Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA
[3] Johns Hopkins Univ Bloomberg Sch Publ Hlth, Dept Med, Baltimore, MD USA
[4] Johns Hopkins Univ Bloomberg Sch Publ Hlth, Welch Ctr Prevent Epidemiol & Clin Res, Baltimore, MD USA
[5] Harvard Med Sch, Glauoma Ctr Excellence, Massachusetts Eye & Ear, Boston, MA USA
[6] Massachusetts Eye Inst, 243 Charles St, Boston, MA 02114 USA