1. From the Department of Internal Medicine (U.G., L.F., A.B., M.H., H.-J.K., K.M., W.S., F.G., U.S.) and the Department of Pathology (L.F., R.M.B.), Justus-Liebig-University, Giessen, Germany; and the Second Department of Internal Medicine (M.B.), Johannes-Gutenberg-University, Mainz, Germany.