title: Hepatitis B virus DNA and RNA in primary liver cancer.
mesh_terms: D004279:DNA, Viral / Q000032:analysis*; D006515:Hepatitis B virus / Q000235:genetics*; D006801:Humans; D008113:Liver Neoplasms / Q000209:etiology*; D012367:RNA, Viral / Q000032:analysis*
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral