1. Rue Barbès, Montrcmge, France
2. Taylor Nelson, SOFRES Healthcare, France
3. Rhône-Poulenc Rorer, France
4. Psychopharmacology Unit, School of Medical Sciences, Bristol, UK
5. Department of Psychiatry, Georg-August-University, Von-Siebold-Strasse, Göttingen, Germany
6. Sleep Disorders Unit, Department of Neuroscience, University Hospital, Uppsala, Sweden
7. CHU Brugmann Sleep Unit, Brussels, Belgium
8. Sleep Disorders Clinic, Mater Private Hospital, Dublin, Ireland