44PPD-L1 blockade during ex vivo expansion of virus-specific T cells for the treatment of infections after allogeneic hematopoietic stem cell transplantation modulates the phenotype and functional activity of T cells. (17th December 2018) - Merhi, M; Jalis, M; Sivaraman, S; Inchakalody, V; Raza, A; Bakr, M; Pittari, G; Uddin, S; Knuth, A; Dermime, S