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ROC curves in subgroups according to BW centile for the prediction of adverse perinatal outcome of UA PI (black), MCA PI (red), CPR (orange) and UA PI plus CPR combined (blue) for: BW centile <10 (n = 3594), BW centile between 10 and 25 (n = 2929) and BW centile ≥25 (n = 13 193).
