1. From UK Centre for Tissue Engineering (N.J.T., M.O.M., C.M.K., R.A.B., M.G.W., A.E.C.), Universities of Manchester (N.J.T., M.O.M., C.M.K., M.G.W., A.E.C.) and Liverpool (R.A.B.); Department of Vascular Surgery (N.J.T., M.O.M., M.G.W.), Manchester Royal Infirmary; Wellcome Trust Centre for Cell Matrix Research (C.M.K., C.A.S., M.J.H., A.E.C.), University of Manchester; and Faculty of Medicine and Human Sciences (A.E.C.), University of Manchester; Manchester, United Kingdom.