Table 1. Sources of HIV-infected infant DNA PCR test results.

Data Source	Site	Dates
Infant HIV test logbooks	ANC clinics	February 2004 – April 2007
Referral logbooks	ANC clinics	January 2005 – December 2008
BAN and PMTCT electronic laboratory results	Bwaila ANC clinic	August 2004 – December 2008
EID electronic database	ANC clinics and Baylor COE	April 2007 – December 2008
EID logbooks and master cards	ANC clinics	April 2007 – December 2008
Baylor COE electronic database	Baylor COE	October 2004 – December 2008
ART treatment registers	District Health Centers	January 2007- December 2008
Pediatric HIV clinic registers	District Health Centers	February 2007- December 2008

ART, antiretroviral therapy, BAN, Breastfeeding Antiretroviral and Nutrition study, PMTCT, Prevention of Mother to Child Transmission; EID, early infant diagnosis; ANC, antenatal clinic; COE, Centre of Excellence