Beta-chemokines (RANTES, MIP-1Alpha and MIP-1Beta) production in PBMC obtained from HTLV-I, HTLV-1, AND co-infected patients in São Paulo, Brazil - Montanheiro, P.; Penalva-de-Oliveira, A.; Casseb, J.; Duarte, A.; Posada, M. M. (Internacional Conference on Human Retrovirology : HTLV and Related Viruses, 2003)