Molecular detection of measles virus by rt-pcr in serum specimens: a model for viral surveillance in brazil - Oliveira, M. I.; Curti, S P; Afonso, A M S; Theobaldo, M; Souza, J F; Rota, P; Stewien, Klaus Eberhard; Durigon, Edison Luiz (Reuniao Anual do Instituto Adolfo Lutz, 1996)