1. From the Max-Planck-Institute for Physiological and Clinical Research (F.P., S.B., W.-J.C., W.S.), Bad Nauheim; the Divisions of Vascular Surgery and Radiology (F.A., B.Z., G.K., R.R., J.B., T.S.-R.), University of Frankfurt/Main; and Proteome Factory AG (C.S.), Berlin, Germany. E-mail w.schaper@kerckhoff.mpg.de