1. Department of Psychiatry, University of Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
2. Department of Psychiatry, University of Munich, Nußbaumstr. 7, 80336 Munich, Germany
3. Institute of Clinical Chemistry & Pathobiochemistry, University of Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
4. Max-Planck-Institute for Human Cognitive and Brain Sciences, P.O. Box 500355, 04103 Leipzig, Germany
5. Day Clinic of Cognitive Neurology, University of Leipzig, 04103 Leipzig, Germany