[1] CHU Vaudois, Transplantat Ctr, CH-1011 Lausanne, Switzerland
[2] Fac Biol & Med, Lausanne, Switzerland
[3] Massachusetts Gen Hosp, Renal Unit, Boston, MA 02114 USA
[4] Massachusetts Gen Hosp, Transplantat Unit, Boston, MA 02114 USA
[5] Harvard Univ, Sch Med, Boston, MA 02115 USA