1. From the Department of Clinical Epidemiology (K.H.P., F.M., S.P.J.), Aarhus University Hospital, Aarhus, Denmark; the Department of Neurology (G.A.), Aarhus University Hospital, Aarhus Hospital, Aarhus, Denmark; and The NIP Secretariat (A.I., B.R.K., P.D.B.), Aarhus, Denmark.