Swimmer plot of response duration. In total, 33 patients had partial response (PR) or CR on study treatment. Bar length indicates duration of response. The segment to the left of the horizontal line indicates the induction phase, which consisted of 12 cycles of treatment. Red, orange, and yellow bars indicate CR, PR, and time off treatment, respectively. Arrows, green diamonds, and blue Xs indicate ongoing response, death, and disease progression, respectively.