[Electron microscopic observation on virus-like particles in duck liver cancer cells from high incidence area of human hepatocellular carcinoma].
D000818:Animals; D006528:Carcinoma, Hepatocellular / Q000453:epidemiology; D002681:China; D004372:Ducks; D006515:Hepatitis B virus / Q000302:isolation & purification*; D006801:Humans; D008113:Liver Neoplasms / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D008854:Microscopy, Electron; D011201:Poultry Diseases / Q000382:microbiology* / Q000473:pathology