Recommendations for quantification methods during the performance of a pediatric echocardiogram: a report from the Pediatric Measurements Writing Group of the American Society of Echocardiography Pediatric and Congenital Heart Disease Council
J Am Soc Echocardiogr. 2010 May;23(5):465-95; quiz 576-7.
doi: 10.1016/j.echo.2010.03.019.