title: Reply to failure of combined costimulatory blockade in animal transplant model
authors.affiliation: Department of Medicine Harvard Medical School Research North, Rm 380 Division of Immunology Beth Israel Deaconess Medical Center, P.O. Box 15707, Boston, Massachusetts 02215, USA tstrom@caregroup.harvard. edu.
authors.initials: Y
authors.lastname: Li
authors.initials: TB
authors.lastname: Strom