1. From Duke University Medical Center, Durham, NC (G.M.F., M.F., L.K.S., R.C., S.C.S., M.D., C.M.O.); Thomas Jefferson University, Philadelphia, PA (D.J.W.); University of Brescia, Brescia, Italy (L.B.); Wake Forest University, Winston-Salem, NC (D.W.K.); Nancy University, Nancy, France (F.Z.); and Case Western Reserve University, Cleveland, OH (I.L.P.).