1. Center for Addictive Disorders, Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital University of Zurich Zurich Switzerland
2. Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital University of Zurich Zurich Switzerland
3. Institute of Forensic Medicine, Department of Forensic Medicine and Imaging University of Zurich Zurich Switzerland
4. Institute for Biomedical Engineering University and Swiss Federal Institute of Technology Zurich Zurich Switzerland
5. Zurich Center for Integrative Human Physiology University of Zurich Zurich Switzerland
6. Max Planck Institute for Biological Cybernetics Tuebingen Germany
7. University of Texas Southwestern Medical Center Dallas Texas US
8. Neuroscience Center Zurich University of Zurich and Swiss Federal Institute of Technology Zurich Zurich Switzerland