[1] Jaeb Ctr Hlth Res, Tampa, FL USA
[2] Retina Fdn Southwest, Dallas, TX USA
[3] Fdn Fighting Blindness, Columbia, MD USA
[4] Oregon Hlth & Sci Univ, Casey Eye Inst, Portland, OR 97201 USA
[5] Univ Calif San Francisco, Ophthalmol, San Francisco, CA 94143 USA
[6] Ophthalm Res Consultants, Waxhaw, NC USA
[7] Duke Univ, Med Ctr, Ophthalmol, Durham, NC USA
[8] Univ Penn, Philadelphia, PA 19104 USA