1. Department of Psychiatry and Psychotherapy; Faculty of Medicine; Medical Center - University of Freiburg; University of Freiburg; Freiburg Germany
2. University Hospital of Old Age Psychiatry and Psychotherapy; University Psychiatric Services; Bern Switzerland
3. University Hospital of Psychiatry and Psychotherapy; University Psychiatric Services; Bern Switzerland
4. Sleep-Wake-Epilepsy-Center; Department of Neurology; University Hospital; Bern Switzerland