1. Cuban Center for Neuroscience, Havana, Cuba
2. KU Leuven, Leuven Brain Institute, Neuropsychiatry, Leuven, Belgium
3. Geriatric Psychiatry, University Psychiatric Center KU Leuven, Leuven, Belgium
4. U992 (Cognitive neuroimaging unit), NeuroSpin, INSERM-CEA, 91191 Gif sur Yvette, France
5. Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands