[1] Yale Sch Med, Ophthalmol & Visual Sci, New Haven, CT USA
[2] Univ Vermont, Larner Coll Med, Burlington, VT USA
[3] Johns Hopkins Med, Wilmer Eye Inst, Baltimore, MD USA
[4] Yale Univ, Sch Publ Hlth, New Haven, CT USA
[5] Univ Michigan, Dept Ophthalmol & Visual Sci, Ann Arbor, MI USA
[6] Yale Sch Med, New Haven, CT USA