[1] Medstar Harbor Hosp, Baltimore, MD USA
[2] Tufts Univ, Sch Med, Boston, MA 02111 USA
[3] Univ Maryland, Sch Med, Dept Ophthalmol & Visual Sci, 419 W Redwood,Suite 470, Baltimore, MD 21201 USA
[4] Univ Hosp Birmingham NHS Fdn Trust, Birmingham, W Midlands, England
[5] Tufts Univ, Sch Med, New England Eye Ctr, Boston, MA 02111 USA
[6] Univ Louisville, Sch Med, Dept Ophthalmol & Visual Sci, Louisville, KY 40292 USA
[7] Univ Maryland, Sch Med, Baltimore, MD 21201 USA
[8] Johns Hopkins Univ, Wilmer Eye Inst, Glaucoma Ctr Excellence, Baltimore, MD 21218 USA