1. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
2. Center for Motor Neuron Biology and Disease, Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA.
3. Biogen, Cambridge, MA 02142, USA.
4. Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
5. Genetic Resource Science, The Jackson Laboratory, Bar Harbor, ME 04609, USA.
6. F. Hoffmann–La Roche Ltd., pRED, Pharma & Early Development, Roche Innovation Center Basel, Basel CH-4070, Switzerland.
7. PTC Therapeutics, 100 Corporate Court, South Plainfield, NJ 07080, USA.
8. Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
9. Department of Neurology, Columbia University, New York, NY 10032, USA.
10. Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.