1. Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, California.
2. Pavlov Institute of Physiology, St. Petersburg, Russia.
3. Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia.
4. Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California.
5. Neuromotor Recovery and Rehabilitation Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California.
6. Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, San Francisco, California.
7. Brain Research Institute, University of California, Los Angeles, Los Angeles, California.