[1] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Surg,Surg Res Lab, Boston, MA 02115 USA
[2] Harvard Univ, Brigham & Womens Hosp, Sch Med, Renal Div,Lab Immunogenet & Transplantat, Boston, MA 02115 USA
[3] Inst Genet, Cambridge, MA USA
[4] Childrens Hosp, Dept Pathol, Philadelphia, PA 19104 USA