1Department of Geriatric Medicine, Marien Hospital Herne, Ruhr-University Bochum, Bochum, Germany
2Charité Research Group on Geriatrics, Charité - Universitätsmedizin Berlin, Berlin, Germany
3Institute of Human Nutrition and Food Science, Christian-Albrechts-University, Kiel, Germany
4Department of Neurology, University Hospital Münster, Münster, Germany