Affiliation: | 1.Department of Virology,Aggeu Magalh?es Research Center, Oswaldo Cruz Foundation (FIOCRUZ),Recife,Brazil;2.Universidade Federal Rural de Pernambuco (UFRPE),Recife,Brazil;3.Embrapa Suínos e Aves,Concórdia,Brazil;4.Department of Biochemistry,Federal University of Pernambuco,Recife,Brazil |