1. Department of Clinical Gerontology and Rehabilitation, Robert-Bosch-Hospital, Stuttgart, Germany
2. Institute for Biomedicine of Aging, Friedrich-Alexander-University Erlangen-Nuremberg, Nuremberg, Germany
3. Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
4. IB Hochschule Berlin, Studienzentrum Stuttgart, Stuttgart, Germany
5. Department of Psychology, Eberhard Karls University, Tubingen, Germany
6. Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway