1. University of Groningen, University Medical Center Groningen; Department of Nuclear Medicine and Molecular Imaging; 9713 GZ Groningen The Netherlands
2. University of Groningen; Center for Behavior and Neurosciences; 9747 AG Groningen The Netherlands
3. Neurobiology Research Unit; Rigshospitalet and University of Copenhagen; DK-2100 Copenhagen Denmark
4. University of Groningen, University Medical Center Groningen; University Psychiatric Center; 9713 GZ Groningen The Netherlands