[1] Washington Univ, Ophthalmol, St Louis, MO USA
[2] Illinois Coll Optometry, Chicago, IL USA
[3] Carl Vinson VAMC, Dublin, GA USA
[4] Univ Calif Berkeley, Berkeley, CA 94720 USA
[5] Illinois Eye & Ear Infirm, Chicago, IL USA
[6] Northeastern State Univ, Tallequah, OK USA
[7] Ohio State Univ, Columbus, OH 43210 USA
[8] Brooke Army Med Ctr, Ft Sam Houston, TX 78234 USA
[9] Massachusetts Eye & Ear, Boston, MA USA