[1] Baylor Coll Med, Dept Pediat, Lillie Frank Abercrombie Sect Cardiol, Houston, TX 77030 USA
[2] Texas Childrens Hosp, Houston, TX 77030 USA
[3] Chung Shan Med Univ Hosp, Div Pediat Cardiol, Taichung, Taiwan
[4] St Lukes Episcopal Hosp, Texas Heart Inst, Houston, TX USA