1. Lillie Frank Abercrombie Section of Pediatric Cardiology; Baylor College of Medicine; Houston TX USA
2. Section of Pediatric Cardiology; Stanford University School of Medicine; Stanford CA USA
3. Department of Radiology; Baylor College of Medicine; Houston TX USA
4. Department of Obstetrics; Mayo Clinic School of Medicine; Rochester MN USA
5. Department of Obstetrics; Baylor College of Medicine; Houston TX USA
6. Section of Pediatric Surgery; Baylor College of Medicine; Houston TX USA