Study	Reason for exclusion
Becquet 2006	Not a randomized clinical trial (prospective cohort study); mothers had received antiretrovirals perinatally.
Becquet 2008	Not a randomized clinical trial (open‐labeled cohort study); mothers had received antiretrovirals perinatally.
Bobat 1997	Not a randomized clinical trial (prospective cohort study).
Dabis 1999	This study addressed in utero/intrapartum transmission (not a trial addressing prevention of late postnatal transmission)
Embree 2000	Not a randomized clinical trial (longitudinal observational cohort study).
Gray 2005	This study addresses prevention of peripartum transmission of HIV.  Was not designed (and did not address) late postnatal/breastfeeding transmission of HIV.
Guay 1999	This study addressed in utero/intrapartum transmission (not a trial addressing prevention of late postnatal transmission)
Iliff 2005	This is analysis of data regarding infant feeding (data came from a randomized trial addressing a different topic), i.e., this is an analysis of prospectively collected data regarding infant feeding modalities and infant HIV infection status.
Kilewo 2008	Not a randomized clinical trial (prospective cohort study).
Miotti 1999	Not a randomized clinical trial (prospective cohort study).
SIMBA 2003	Abstract only ‐ manuscript was never published.  Authors of the study were contacted, but no further information was obtained.