Fig. 1From: Potential anti-EBV effects associated with elevated interleukin-21 levels: a case reportHigh power fields (40-fold magnification) of the patient’s lung tissue, demonstrating accumulation of: a large HE stained cells, b positive for CD20+ while also displaying extensive coloring for c the proliferation marker Ki-67+ and for d Epstein–Barr virus-encoded small RNAs (EBER, Ventana, Tucson, USA)Back to article page