A comparison of the slopes at 3 months of age showed a trend for a flatter slope among those who died (+0.0072) than among those who survived (-0.0017) suggesting greater attenuation of the EPO-Hb association among those who died and, perhaps, unique resilience among those who survived.
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Neonatal erythropoiesis and subsequent anemia in HIV-positive and HIV-negative Zimbabwean babies during the first year of life: a longitudinal study.
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The sentences
These ages span highly significant changes in normal hematological development characterized by a switch in the site of EPO production from the liver to the kidney, greater oxygen consumption with increasing activity and growth, and a switch from fetal to adult hemoglobin with a decrease in oxygen affinity favoring oxygen delivery.