1. Department of Geriatric Medicine, RWTH Aachen University Hospital, Germany
2. Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nuremberg, Germany
3. Institute of Radiology, University Hospital Regensburg, Germany
4. Institute of Clinical Chemistry, Laboratory Medicine and Transfusion Medicine, General Hospital Nuremberg, Paracelsus Medical University, Nuremberg, Germany