title: Biotechnology: interferon patent contested.
mesh_terms: D004274:DNA, Recombinant; D005818:Genetic Engineering; D006801:Humans; D007372:Interferons / Q000235:genetics*; D038622:Internationality; D010330:Patents as Topic; D013557:Switzerland; D014481:United States
chemical_list: D004274:DNA, Recombinant; D007372:Interferons