[1] Univ Michigan, Inst Life Sci, Ann Arbor, MI 48109 USA
[2] Cornell Univ, Dept Mol Biol & Genet, Ithaca, NY 14853 USA
[3] Univ Penn, Cell & Mol Biol Grad Program, Philadelphia, PA 19104 USA
[4] Howard Hughes Med Inst, Chevy Chase, MD 20815 USA
[5] Univ Penn, Dept Genet, Philadelphia, PA 19104 USA
[6] Univ Michigan, Human Genet Grad Program, Ann Arbor, MI 48109 USA
[7] NINDS, Neurogenet Branch, NIH, Bethesda, MD 20892 USA
[8] Univ Michigan, Dept Pediat, Ann Arbor, MI 48109 USA
[9] Univ Michigan, Dept Genet, Ann Arbor, MI 48109 USA