[1] UNIV HOSP LEIDEN,MED CTR,DEPT DERMATOL,POB 19600,2300 RC LEIDEN,NETHERLANDS
[2] LEIDEN STATE UNIV,MED CTR,DEPT OPHTHALMOL,2312 AV LEIDEN,NETHERLANDS
[3] LEIDEN STATE UNIV,MED CTR,DEPT HUMAN GENET,2312 AV LEIDEN,NETHERLANDS
[4] ERASMUS UNIV,DEPT PATHOL,3000 DR ROTTERDAM,NETHERLANDS