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Arterial Oxygen tension (PaO2) changes with 100% oxygen preterm lambs (closed square), 21% oxygen preterm lambs (open diamond), titrated oxygen (closed circle) and term 21% (triangle)oxygen controls (triangle). * 100% preterm oxygen statistically different from the rest by ANOVA (p<0.001). ¶ Titrated oxygen group different from 21% preterm by ANOVA (p<0.01).
