rprospective study of perinatal infection of HIV-1; binomial form »¿à.UH »22 Jul 2009 16:28üüüücd40001cd80001hiv0001enian000001%9.0g%9.0g%9.0g%9.0g%%9.0g%8.0g%8.0gc%8.0g%8%9.0g%8.0g%6.2f%8.0g%9.0gblood serum level of CD4; ordinal 0, 1, 2 aceblood serum level of CD8; ordinal 0, 1, 2 acenumber of positive HIV casesinal 0, 1, 2 acebinomal sample sizeIV casesinal 0, 1, 2 ace