1Furtado Mdos S, Andrade RG, Romanelli LC, et al. Moni- toring the HTLV-1 proviral load in the peripheral blood of asymptomatic carriers and patients with HTLV-associ- ated myelopathy/tropieal spastic paraparesis from a Bra- zilian cohort:ROC curve analysis to establish the thresh- old for risk disease[J]. J Med Virol, 2012,84 (4) : 664- 71.