1. Department of Psychology, Lund University, Skåne, Sweden
2. Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
3. College of Integrative Medicine and Health Sciences, Saybrook University, Oakland, California, USA
4. Department of Psychology and Neuroscience, Baylor University, Waco, Texas, USA
5. Department of Neurosurgery, University of Milano, Italy
6. Department of Medicine, University of North Carolina at Chapel Hill, USA
7. Department of Dermatology and Cutaneous Surgery, University of South Florida, Tampa, USA
8. Department of Psychology, Goldsmiths, University of London, UK
9. Neurogastroenterology Unit, Wythenshawe Hospital, UK