PTPN11 and chronic graft versus host disease: We then assessed the anti-proliferative ability of GMR CAR T cells generated from a patient with both PTPN11 and SETBP1 mutations who achieved complete chimerism following cord blood transplantation from an unrelated donor and had been treated with a small amount of immunosuppressants for chronic graft-versus-host disease (patient no. 4) [4].