[1] UNIV HOSP ROTTERDAM,DEPT NEUROL,ROTTERDAM,NETHERLANDS
[2] CATHOLIC UNIV SACRED HEART,DEPT PHARMACOL,I-00168 ROME,ITALY
[3] STATE UNIV UTRECHT HOSP,DEPT HEMATOL,3511 GV UTRECHT,NETHERLANDS
[4] STATE UNIV UTRECHT HOSP,DEPT NEUROL,3511 GV UTRECHT,NETHERLANDS