Baseline BCL2, BCL2L1, and MCL1 gene expression levels by best response in 45 patients with evaluable bone marrow samples. Box plot of gene expression levels (log2-transformed copies per microliter normalized to housekeeping gene) based upon response (≥PR [n = 33] vs <PR [n = 12]). Boxes extend from the 25th to 75th percentiles, horizontal bars represent the median, and whiskers extend to the minimum and maximum values. **P < .01 by Wilcoxon rank sum test. NS, not significant at the P < .05 level.