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. 2009 Jan 8;338:a3037. doi: 10.1136/bmj.a3037

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Flow of infants through study and detection of neonatal heart disease by pulse oximetry screening and by physical examination alone. *1/18 with positive pulse oximetry screening was discharged home without echocardiogram (protocol violation). **Pathological pulse oximetry screening as no signal could be obtained in feet.