1. Memory and Aging Center, Department of Neurology University of California San Francisco California USA
2. Sección de Neurología, Departamento de Especialidades, Facultad de Medicina Universidad de Concepción Concepción Chile
3. Department of Communication Sciences and Disorders Adelphi University Garden City New York USA
4. Department of Psychiatry Douglas Mental Health University Institute, McGill University Montréal Canada
5. Faculty of Health Sciences Universidad del Desarrollo Concepción Chile
6. Department of Epidemiology and Biostatistics University of California San Francisco California USA
7. Department of Otolaryngology Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School Boston Massachusetts USA
8. Department of Speech, Language, and Hearing Sciences University of Texas Austin Texas USA
9. Department of Communicative Disorders and Sciences San Jose State University San Jose California USA