T Cell Costimulation Blockade with CTLA4-Ig (Abatacept) for Acute Gvhd Prevention in HLA Matched and Mismatched Unrelated Donor Transplantation: Results of the First Phase 2 TrialBen Watkins, Leslie S. Kean, Brandi Bratrude et al.|Transplantation and Cellular Therapy|2019Cited by 11