1. Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
2. Research Imaging Institute, University of Texas Health Science Center at San Antonio, San Antonio, Texas
3. Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany
4. Institute of Clinical Neuroscience and Medical Psychology, Heinrich Heine University, Düsseldorf, Germany