Viruses as etiological factors in cancer.
D000818:Animals; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D006801:Humans; D009369:Neoplasms / Q000209:etiology* / Q000235:genetics / Q000382:microbiology / Q000473:pathology; D009857:Oncogenes; D009858:Oncogenic Viruses / Q000302:isolation & purification / Q000472:pathogenicity; D012190:Retroviridae / Q000235:genetics / Q000302:isolation & purification / Q000472:pathogenicity*