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Ultrasound in Medicine & Biology > 2010 > 36 > 10 > 1637-1643
Digestive Diseases and Sciences > 2006 > 51 > 5 > 982-985
European Radiology > 2004 > 14 > 4 > 583-591
Ultrasound in Medicine & Biology > 1999 > 25 > 7 > 1047-1054