[1] ROCHE PROD AB,CLIN RES,STOCKHOLM,SWEDEN
[2] KAROLINSKA INST,DEPT PSYCHIAT & PSYCHOL,S-10401 STOCKHOLM 60,SWEDEN
[3] KAROLINSKA INST,DEPT CLIN NEUROPHYSIOL,S-10401 STOCKHOLM 60,SWEDEN
[4] KAROLINSKA INST,DEPT NEURORADIOL,S-10401 STOCKHOLM 60,SWEDEN
[5] KAROLINSKA INST,DEPT NEUROSURG,S-10401 STOCKHOLM 60,SWEDEN
[6] KAROLINSKA PHARM,STOCKHOLM,SWEDEN
[7] NATL BACTERIOL LAB,S-10521 STOCKHOLM,SWEDEN