Study observation:Find:Pt:Heart.ventricle.right.outflow tract^Fetus:Nar:US
study observation:find:pt:heart.ventricle.right.outflow tract^fetus:nar:us
Study observation:Find:Pt:Heart.ventricle.right.outflow tract^Fetus:Nar:US
study observation:find:pt:heart.ventricle.right.outflow tract^fetus:nar:us