1. Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg; Nuremberg Germany
2. Institute of Radiology; University Hospital Regensburg; Regensburg Germany
3. Institute of Clinical Chemistry, Laboratory Medicine and Transfusion Medicine; Paracelsus Medical University; Nuremberg Germany
4. Department of General Internal Medicine and Geriatrics; Hospital of the Order of St. John of God; Regensburg Germany