Retroviral DNA--the silent winner: blood transfusion containing latent feline leukemia provirus causes infection and disease in naïve recipient cats. - Nesina S; Katrin Helfer-Hungerbuehler A; Riond B; Boretti FS; Willi B; Meli ML; Grest P; Hofmann-Lehmann R (Retrovirology, 2015)