1. Department of Biology, Johns Hopkins University, Baltimore, MD, USA.
2. John F. Hardesty, MD, Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, MO, USA.
3. Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, USA.
4. Department of Biology, University of Maryland, College Park, MD, USA.
5. Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
6. National Institute of Mental Health (NIMH), National Institutes of Health (NIH), Bethesda, MD, USA.
7. Cellular Neurobiology Research Unit, Institut de Recherches Cliniques de Montréal, Montréal, QC H2W 1R7, Canada.
8. Molecular Biology Programs, Université de Montréal, QC H3C 3J7, Canada.
9. Department of Anatomy and Cell Biology, McGill University, Montréal, QC H3A 0G4, Canada.
10. Department of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada.
11. Department of Neurobiology, Northwestern University, Evanston, IL, USA.
12. National Eye Institute, National Institutes of Health, Bethesda, MD, USA.
13. Research and Development Institute, Transylvania University of Brasov, School of Medicine, Brasov, Romania.
14. Department of Cell Biology and Human Anatomy, University of California, Davis School of Medicine, Davis, CA, USA.
15. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
16. Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
17. Kavli Neuroscience Discovery Institute, Johns Hopkins University, Baltimore, MD, USA.