1. Department of Psychiatry; Psychotherapy and Psychosomatics, Psychiatric Hospital, University of Zurich; Zurich 8032 Switzerland
2. Division of Clinical Psychiatry Research; Psychiatric Hospital, University of Zurich; Zurich 8032 Switzerland
3. Neuroscience Center Zurich, University of Zurich; Zurich 8057 Switzerland
4. Wellcome Trust Centre for Neuroimaging and Max Planck UCL Centre for Computational Psychiatry and Ageing Research, University College London; London WC1N 3BG United Kingdom