1. From Division of Angiology, Department of Medicine II (M.M., M.E.G., G.-A.G., S.C.R., R.K., O.S.), Center of Medical Statistics, Informatics and Intelligent Systems (J.G.), Division of Rheumatology, Department of Medicine III (H.P.K., J.S.S.), and Department of Laboratory Medicine (T.P.), Medical University of Vienna, Austria.