1. Myriad Genetic Laboratories, Inc., Medical Services, Salt Lake City, Utah.
2. Department of OB/GYN, University of South Carolina, Columbia, South Carolina.
3. Department of Neurogenetics, Kennedy Krieger Institute, Baltimore, Maryland
4. Section of Medical Genetics and Molecular Medicine, Children's Mercy Hospitals and Clinics, and the University of Missouri–Kansas City School of Medicine, Kansas City, Missouri