Prevention of mother-to-child transmission of HIV-1 through breastfeeding by treating infants or mothers prophylactically with antiretrovirals in Dar es Salaam, Tanzania: the MITRA... by Mhalu Fred, Swai Andrew, Bakari Muhamad, Msemo Georgina, Lipyoga Rosina, Massawe Augustine, Lyamuya Eligius, Ngarina Matilda, Karlsson Katarina, Kilewo Charles, Biberfeld Gunnel