Survival according to ERG and BAALC expression. Event-free survival for AML patients under the age of 19 with MLL (11q23) rearrangement and high or low ERG (A) and BAALC (B) expression, respectively. Patients were diagnosed 1997-2007 in Denmark, Finland, Iceland, Norway, or Sweden. High and low ERG and BAALC expression were defined as above and below the median value of all 149 pediatric non-APL AML patients included in the study.