[1] Ohio State Univ, Coll Optometry, Columbus, OH 43210 USA
[2] Univ Dusseldorf, Dept Ophthalmol, Dusseldorf, Germany
[3] Tauber Eye Ctr, Kansas City, MO USA
[4] Univ Paris, Dept Ophthalmol, Quninze Vingts Hosp, F-75252 Paris, France
[5] Tsurumi Univ, Dept Ophthalmol, Sch Dent Med, Yokohama, Kanagawa, Japan
[6] Keio Univ, Sch Med, Dept Ophthalmol, Tokyo, Japan
[7] Bascom Palmer Eye Inst, Palm Beach Gardens, FL USA
[8] Univ Genoa, Inst Eye, Genoa, Italy