Figure 1From: Birth weight for gestational age norms for a large cohort of infants born to HIV-negative women in Botswana compared with norms for U.S.-born black infants Selection of analysis dataset. Analysis set limited to live births without congenital abnormalities born to HIV-negative women; outliers removed as discussed in methods. * Oken E, Kleinman KP, Rich-Edwards J, Gillman MW. A nearly continuous measure of birth weight for gestational age using a United States national reference. BMC Pediatrics 2003;3:10.Back to article page