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Contemporary Clinical Trials > 2013 > 36 > 2 > 421-435
Progress in Pediatric Cardiology > 2008 > 25 > 2 > 147-151
Contemporary Clinical Trials > 2013 > 36 > 2 > 421-435
Progress in Pediatric Cardiology > 2008 > 25 > 2 > 147-151