1. From the Vascular Laboratory, Department of Clinical Therapeutics (K.S.S., C.M.P., E.C., K.K., G.G., A.P., M.M.), Alexandra Hospital, Greece; the Dudley Group of Hospitals NHS Foundation Trust, Dudley, and Arthritis Research Campaign Epidemiology Unit (G.D.K., V.F.P., A.S.), University of Manchester, UK; and the First Department of Propaedeutic and Internal Medicine (N.T., P.P.S.), Laikon Hospital, Athens University Medical School, Greece.