1. From the Department of Surgery (N.G., N.K., J.M.P., K.B.S., N.S., R.d.M., D.E., V.R.O., R.Y.K., M.J.H., S.J., J.H.R., R.L.R.), University of California San Francisco and VA Medical Center, San Francisco, CA; and Division of Vascular and Endovascular Surgery (L.M.M.), University of Massachusetts Medical School, Worcester, MA.