1. University of Zurich, Institute of Psychology, Division of Biopsychology, Zurich, Switzerland, Binzmühlestrasse 14/5, 8050 Zürich
2. University of Tübingen, Department of Psychology, Division of Clinical Psychology and Psychotherapy, Tübingen, Germany
3. Zurich Center for Interdisciplinary Sleep Research (ZiS), University of Zurich, Zurich, Switzerland
4. University of Fribourg, Department of Psychology, Division of Cognitive Biopsychology and Methods, Fribourg, Switzerland