HIV-infected mothers ( CD4 > 200 cells/L ) and their infants were randomly assigned to 28-week interventions : maternal LNS/maternal ARV ( n = 424 ) , maternal LNS/infant ARV ( n = 426 ) , maternal LNS ( n = 334 ) , maternal ARV ( n = 425 ) , infant ARV ( n = 426 ) , or control ( n = 334 ) .