[1] LEIDEN STATE UNIV,DEPT NEUROL,2312 AV LEIDEN,NETHERLANDS
[2] LEIDEN STATE UNIV,DEPT HUMAN GENET,2312 AV LEIDEN,NETHERLANDS
[3] LEIDEN STATE UNIV,DEPT IMMUNOHAEMATOL,2312 AV LEIDEN,NETHERLANDS
[4] FREE UNIV AMSTERDAM,INST HUMAN GENET,1007 MC AMSTERDAM,NETHERLANDS
[5] DUTCH RED CROSS BLOOD TRANSFUS SERV,CENT LAB,AMSTERDAM,NETHERLANDS