1. Department of Neurology, Harvard Medical School/The Biological Laboratories, Cambridge, Massachusetts.
2. Department of Neurology/Neurophysiology, Massachusetts General Hospital, Boston, Massachusetts.
3. Department of Pediatrics, University of Massachusetts Medical School/Eunice Kennedy Shriver Center, Waltham, Massachusetts.
4. Department of Otolaryngology, Harvard University Health Services, Cambridge, Massachusetts.
5. Colegio Ciencias de la Salud, del Colegio de Artes Liberales y de GAIAS; Departamento de Desarrollo Comunitario Integral, Universidad San Francisco de Quito, Quito, Ecuador.