[1] UNIV TURKU,DEPT OPHTHALMOL,SF-20520 TURKU 52,FINLAND
[2] UNIV TURKU,DEPT NEUROL,SF-20520 TURKU 52,FINLAND
[3] UNIV TURKU,DEPT OTORHINOLARYNGOL,SF-20520 TURKU 52,FINLAND
[4] UNIV TURKU,DEPT CLIN NEUROPHYSIOL,SF-20520 TURKU 52,FINLAND
[5] SATAKUNTA CENT HOSP,DEPT OPHTHALMOL,PORI,FINLAND
[6] GOTHENBURG UNIV,DEPT PATHOL 1,S-41124 GOTHENBURG,SWEDEN