[1] VET ADM MED CTR,NEUROL SERV,WASHINGTON,DC 20422
[2] GEORGETOWN UNIV,SCH MED,DEPT NEUROL,WASHINGTON,DC 20057
[3] GEORGETOWN UNIV,SCH MED,DEPT COMMUNITY MED,WASHINGTON,DC 20057
[4] ROSKILDE CTY HOSP,DEPT NEUROL,ROSKILDE,DENMARK
[5] DANISH MS REGISTRY,COPENHAGEN,DENMARK