1. Center for Chronic Pruritus Department of Dermatology University Hospital Münster Von‐Esmarch‐Straße 58 48149 Münster Germany
2. 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
3. Institute of Medical Informatics University of Münster Münster Germany