Bone marrow MSC from pediatric patients with B-ALL highly immunosuppress T-cell responses but do not compromise CD19-CAR T-cell activity ======================================================================================================================================== * Samanta Romina Zanetti * Paola Alejandra Romecin * Meritxell Vinyoles * Manel Juan * José Luis Fuster * Mireia Cámos * Sergi Querol * Mario Delgado * Pablo Menendez