1. Division of Neurogeriatrics, Department of Neurology, Medical University of Graz, Styria, Austria
2. Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Styria, Austria
3. Department of Neurology, Medical University of Graz, Styria, Austria
4. Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, University of Texas Health Sciences Center, San Antonio, TX 78229, USA
5. Department of Neurology, Boston University School of Medicine, Boston, MA 02118, USA
6. Research Unit-Genetic Epidemiology, Gottfried Schatz Research Centre for Cell Signalling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University of Graz, Graz, Styria, Austria