1. Department of Neurology, Harvard Medical School/The Biological Laboratories, Harvard University, Cambridge, Massachusetts.
2. Department of Neurophysiology, Massachusetts General Hospital, Boston, Massachusetts.
3. Department of Otolaryngology, Audiology Clinic, Harvard University Health Services, Cambridge, Massachusetts.
4. Colegio de Ciencias de la Salud, Escuela de Salud Pública and Galapagos Institute of Arts and Sciences GAIAS, Universidad San Francisco de Quito, Quito, Ecuador.
5. Harvard Biological Laboratories, Harvard University, Cambridge, Massachusetts.
6. Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.