1. Centre for Dermatology Division of Musculoskeletal and Dermatological Sciences University of Manchester Manchester U.K.
2. Manchester Centre for Health Psychology University of Manchester Manchester U.K.
3. School of Healthcare Sciences University of Cardiff Cardiff U.K.
4. Sleep and Circadian Neuroscience Institute Nuffield Department of Clinical Neurosciences University of Oxford Oxford U.K.
5. Salford Royal NHS Foundation Trust Manchester U.K.
6. Department of Psychological Sciences University of Liverpool Liverpool U.K.