1. Section Pruritus Medicine of the Department of Dermatology and Center for Chronic Pruritus University Hospital Münster Münster Germany
2. Institute of Allergology, Charité – Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt‐Universität zu Berlin Berlin Germany
3. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology Berlin Germany
4. Department of Dermatology and Venereology Medical University of Graz Graz Austria
5. Department of Dermatology University Hospital of Brest Brest France
6. Dermatology and Venereology Unit, Department of Medicine Solna Karolinska Institutet Stockholm Sweden
7. Barts Health NHS Trust & Queen Mary University London UK
8. Moscow Scientific and Practical Center of Dermatovenerology and Cosmetology Moscow Russia
9. Department of Dermatology and Allergy, Herlev and Gentofte Hospital University of Copenhagen Hellerup Denmark
10. Institute of Psychology, Health, Medical and Neuropsychology Unit Leiden University Leiden The Netherlands
11. Dermatology Outpatient Office Rome Italy
12. Department for Psychosomatics Vitos‐Klinikum Gießen Gießen Germany
13. Department of Dermatology University Hospital and Faculty of Medicine, University of Coimbra Coimbra Portugal
14. Institute of Medical Psychology, Justus‐Liebig‐University Gießen Gießen Germany
15. Department of Dermatology Antwerp University Hospital, University of Antwerp Antwerp Belgium
16. Department of Dermatovenereology and Cosmetology Central State Medical Academy of Department of Presidential Affairs Moscow Russia
17. Medical Research and Educational Center Lomonosov Moscow State University Moscow Russia
18. National and Kapodistrian University of Athens, 2nd Department of Dermatology and Venereology, Attikon General Hospital University of Athens Chaidari Greece
19. Department of Dermatology University of Rzeszów Rzeszów Poland
20. Department of Dermatology Aydın Adnan Menderes University Aydın Turkey
21. Department of Psychosomatic Medicine and Psychotherapy University Hospital Münster Münster Germany
22. Department Dermatology Sant Pau Hospital Barcelona Spain
23. Dermatological Practice Bad Bentheim Germany
24. Department of Dermatology, Venereology and Allergology Wroclaw Medical University Wroclaw Poland
25. Department of Dermatology and Venereology Lund University Lund Sweden
26. Division of Occupational Dermatology, Department of Dermatology University of Heidelberg Heidelberg Germany
27. Competence Center for Healthcare Research in Dermatology (CVderm) Institute for Healthcare Research in Dermatology and Nursing (IVDP), University Hospital of Hamburg‐Eppendorf Hamburg Germany