1. Health Psychology Group, Institute of Applied Health Sciences University of Aberdeen, Health Sciences Building, Foresterhill Aberdeen UK
2. National Drug and Alcohol Research Centre University of New South Wales Sydney NSW Australia
3. Department of Clinical Psychology and Experimental Psychopathology University of Groningen Groningen the Netherlands
4. Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience Maastricht University Maastricht the Netherlands
5. Department of Behavioral Science and Health University College London London UK
6. Nuffield Department of Primary Care Health Sciences Oxford UK
7. Centre for behavior Change University College London Gower Street London WC1E 6BT UK
8. Radboud University Medical Center Radboud Institute for Health Sciences, IQ Healthcare Nijmegen the Netherlands