1. Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
2. Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Gertrude H. Sergievsky Center, Department of Neurology, Columbia University, New York, NY, USA
3. Department of Social Medicine, Psychiatry and Neurology, National and Kapodistrian, University of Athens, Athens, Greece