STAT3 and B-cell non-Hodgkin lymphoma: Stat3: signal transducer and activator of transcription 3; BrdU: macrophage marker; Lym-1: a murine IgG2a monoclonal antibody that recognizes B-cell lymphoma cells; ATLL: adult T-cell leukemia/lymphoma; N/A: not applicable; PMN: polymorphonuclear neutrophil