1. Center for Chronic Pruritus University Hospital Münster Muenster Germany
2. Institute of Medical Informatics University of Münster Münster Germany
3. German Center for Health Services Research in Dermatology (CVderm) Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
4. Institute of Biostatistics and Clinical Research University of Muenster Muenster Germany
5. Department of Psychosomatics and Psychotherapy University Hospital Münster Muenster Germany