title: [Factors for acquisition of virulence by influenza A viruses].
authors.affiliation: Division of Virology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo.
authors.forename: Hideo
authors.initials: H
authors.lastname: Goto
mesh_terms: D006388:Hemagglutinins / Q000032:analysis; D009980:Influenza A virus / Q000737:chemistry*; D017361:Viral Nonstructural Proteins / Q000032:analysis; D014764:Viral Proteins / Q000032:analysis; D037521:Virulence Factors / Q000032:analysis*
chemical_list: D006388:Hemagglutinins; C085820:INS1 protein, influenza virus; C502893:PB2 protein, influenza virus; D017361:Viral Nonstructural Proteins; D014764:Viral Proteins; D037521:Virulence Factors