ALK and anaplastic large cell lymphoma: Microarray microRNA-expression profiling was used to identify microRNAs differentially-expressed between NPM-ALK(+) patients (N = 52) and NPM-ALK(−) patients (N = 5) from ALCL samples obtained from chemotherapy-naive patients at diagnosis, normalized against equivalent miRNA levels from RLNs (N = 3) (Supplementary Tables 3 and 4).