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Evolution of the NS genes of the influenza a viruses. II. Characteristics of the amino acid changes in the NS1 proteins of the influenza a virusesKatsuhisa Nakajima; Eri Nobusawa; Setsuko Nakajima · 1990
Influence of host species on the evolution of the nonstructural (NS) gene of influenza A virusesYoshihiro Kawaoka; Owen T Gorman; Toshihiro Ito; Krisna Wells; Ruben O Donis; Maria R Castrucci; Isabella Donatelli; Robert G Webster · 1998