1. School of Health Sciences and Social Work, University of Portsmouth, Portsmouth, UK
2. David Hide Asthma and Allergy Research Centre, Isle of Wight and University of Southampton, Southampton, UK
3. Department of Psychology, University of Portsmouth, Portsmouth, UK
4. School of Health Sciences and Social Work, University of Portsmouth, Portsmouth and David Hide Asthma and Allergy Research Centre, Isle of Wight, UK, Portsmouth, UK