Somatic copy number alternations of CDKN2A/B, PAX5, IKZF1, and EBF1. Copy number heatmaps at 9p21.3 (A), 9p13.2 (B), 7p12.2 (C), and 5q33.3 (D) are shown by patient (orange indicates diagnosis; green, relapse; from left to right: patients 1 to 20).