METHODS	All HIV-infected infants had a baseline CD4 of 25 % , participated in the Comprehensive International Program of Research on AIDS Children with HIV Early Antiretroviral Therapy trial in South Africa , and were randomized in the following groups : group 1 ( n = 20 ) , ART deferred until CD4 < 25 % or severe HIV disease ; and group 2 ( n = 34 ) , ART initiation within 6 to 12 weeks of age .\