Functional restoration of AML-NK cells after CR. AML-NK cells from diagnosis (D0, NCR^dull) or the same patients at CR (NCR^bright) were obtained and amplified as described in “Materials and methods” and assessed for cytolytic activity against the P815 murine cell line. Results are presented as the mean ± SD of maximum lysis percentage of triplicate values at the effector-target ratio of 30:1. Data are from 1 of 3 representative experiments independently performed.