1. Graduate School of Health, University of Technology, Sydney, NSW 2007, Australia
2. Virgin Care NHS, Haslemere, Surrey GU27 2BJ, UK
3. Department of Social Psychology, London School of Economics, London, WC2A 2AE, UK
4. Harrogate Grammar School, Harrogate, North Yorkshire HG2 0DZ, UK
5. School of Psychology, University of Surrey, Guildford, Surrey GU2 7XH, UK