1. Department of Neurology University of Tennessee Health Science Center Memphis Tennessee
2. Department of Speech and Language Pathology University of Memphis Memphis Tennessee
3. Department of Pediatrics University of Tennessee Health Science Center Memphis Tennessee
4. Department of Ophthalmology University of Tennessee Health Science Center Memphis Tennessee
5. Department of Neurology Mass General Hospital Boston Massachusetts
6. Human Genetics Research Laboratory Nemours Biomedical Research Wilmington Delaware
7. Genetics Department Hospital Central “Dr. Ignacio Morones Prieto,” San Luis Potosí SLP Mexico
8. Department of Psychology University of South Alabama Mobile Alabama