ARL2BP and primary effusion lymphoma: We tested a subset of samples using qPCR assays previously demonstrated to detect BART1, BART2, and BHRF miRNA in EBV-positive primary effusion lymphoma and Burkitt lymphoma cell lines or tissues but not EBV-negative samples like Kaposi sarcoma biopsies, immortalised virus-negative endothelial cell lines, or normal tonsil tissue (O’Hara et al, 2008, 2009a; Xia et al, 2008).