1. From the Department of Medicine (B.I., F.B., S.A.S., R.R.,) University Hospital of Trondheim, and The Life Insurance Companies’ Institute of Medical Statistics (L.L.H.), Ullevaal Hospital, Oslo, Norway. Correspondence to Dr Bent Indredavik, The Stroke Unit, Department of Medicine, University Hospital of Trondheim, N-7006 Trondheim, Norway.