[1] INDIANA UNIV, SCH MED, DEPT PEDIAT CARDIOL, INDIANAPOLIS, IN 46223 USA
[2] CHILDRENS HOSP, DEPT CARDIOL, DIV NUCL MED, BOSTON, MA 02115 USA
[3] CHILDRENS HOSP, DEPT CARDIOVASC SURG, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, DEPT RADIOL, BOSTON, MA 02115 USA
[5] HARVARD UNIV, SCH MED, DEPT PEDIAT, BOSTON, MA 02115 USA
[6] HARVARD UNIV, SCH MED, DEPT SURG, BOSTON, MA 02115 USA