[1] Univ Calif San Diego, Dept Ophthalmol, Hamilton Glaucoma Ctr, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Family & Prevent Med, La Jolla, CA 92093 USA
[3] NYU, Sch Med, Dept Ophthalmol, New York, NY USA
[4] New York Eye & Ear Infirm, Einhorn Clin Res Ctr, Dept Ophthalmol, New York, NY 10003 USA
[5] Univ Alabama Birmingham, Dept Ophthalmol, Birmingham, AL USA