2014; 515:563 –7. PF-06936308 C3621001 Final Protocol Amendment 2, 22 Dec 2020 PFIZER CONFIDENTIAL Page 13451. Porter, DL, et al., Chimeric antigen receptor -modified T cells in chronic l ymphoid leukemia. N Engl J Med, 2011. 365(8): p. 725-33. 52.