Improved detectiion of dengue-1 virus from IgM-positive serum samples using C6/36 cell cultures in association with RT-PCR - De Paula, Sérgio Oliveira; Lima, Daniele Malta; Clotteau, Marilidia clotteau; Pires Neto, Roberto da Justa; Fonseca, Benedito Antonio Lopes da (Intervirology, 2003)