1. Department of Physical Medicine and Rehabilitation, Cedars-Sinai Health System, Los Angeles, CA
2. Department of Rehabilitation Medicine, New York University Langone Medical Center, New York, NY;
3. Kessler Institute for Rehabilitation and Kessler Foundation, West Orange, NJ; and Teachers College, Columbia University, New York, NY
4. College of Health and Rehabilitation Sciences, Boston University, Boston, MA;
5. Smith-Kettlewell Eye Research Institute, San Francisco, CA