Comar M, Cuneo A, Maestri I, Melloni E, Pozzato G, Soffritti O, Secchiero P, Zauli G. Merkel-cell polyomavirus (MCPyV) is rarely associated to B-chronic lymphocytic leukemia (1 out of 50) samples and occurs late in the natural history of the disease. J Clin Virol 2012;55(4):367-9.