1. Department of Human Genetics; University of Michigan; Ann Arbor Michigan
2. NIH, Undiagnosed Diseases Program and Office of the Clinical Director; National Human Genome Research Institute, National Institutes of Health; Bethesda Maryland
3. Department of Biochemistry and Molecular Biochemistry; Thomas Jefferson University, Philadelphia; Pennsylvania
4. Division of Neurogenetics and Developmental Pediatrics; Children's National Medical Center; Washington District of Columbia
5. Department of Neurology; University of Michigan; Ann Arbor Michigan