A comparative study of PCR, p24 antigen and HIV-IgA for early diagnosis of perinatal HIV infection in Brazilian - Mussi-Pinhata, Marisa Márcia; Covas, Dimas Tadeu; Ueda, M; Cervi, Maria Célia; Kimura, R; Duarte, Geraldo; Kashima, Simone (World Aids Conference, 1998)