1. Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
2. University of California San Diego, School of Medicine, Department of Pediatrics/Rady Children's Hospital San Diego, Stem Cell Program, La Jolla, CA, USA
3. Departments of Neurosurgery and Physical Medicine and Rehabilitation, Harvard Medical School and Division of SCI Research, VABHS, Boston, MA, USA