title: The emergence of a sub-specialty: the interventional echocardiographer.
authors.forename: David
authors.initials: D
authors.lastname: Rubenson
mesh_terms: D015642:Radiology, Interventional / Q000145:classification* / Q000639:trends*; D013038:Specialization / Q000639:trends*; D018084:Ultrasonography, Interventional / Q000639:trends*; D014481:United States