1. From the Department of Internal Medicine (A.W., I.T., W.S., P.E., K.H., A.R., J.R.P., B.F.), Medical University Innsbruck, Innsbruck, Austria; the Department of Biochemistry (M.M., A.H.), Technische Universität Graz, Graz, Austria; and the Department of Internal Medicine (B.F.), Landeskrankenhaus Bregenz, Bregenz, Austria.