1. Reprints: Jeffrey A. Towbin, MD, Department of Pediatrics (Cardiology), Baylor College of Medicine, One Baylor Plaza, Room 333E, Houston, TX 77030.
2. From the Departments of Pediatrics (Cardiology) (Drs Towbin and Li), Cardiovascular Sciences (Drs Towbin and Wang), and Molecular and Human Genetics (Dr Towbin), Texas Children's Hospital and Baylor College of Medicine, Houston, Tex.