PD-1 / PD-L 1 interactions contribute to functional T cell impairment in patients that relapse with cancer after allogeneic stem cell transplantation

Departments of Laboratory Medicine Laboratory of Hematology, Hematology, Tumor Immunology and Pathology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands Department of Biologics Discovery California, Bristol-Meyers Squibb, Milpitas, CA, USA, and Department of Pediatric Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.