Nutritional Physiology, Department of Nutrition and Food Science, University of Bonn, 53115 Bonn, Germany. Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, 53127 Bonn, Germany. Clinical Study Core Unit, Study Center Bonn, University Hospital Bonn, 53127 Bonn, Germany. Institute of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, 53127 Bonn, Germany. Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, University Hospital Cologne, 50931 Cologne, Germany. Department of Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, 53127 Bonn, Germany. German Center for Neurodegenerative Diseases (DZNE), 53127 Bonn, Germany. Department of Psychiatry and Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX 78229, USA. Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany.