1. Department of Dermatology Clinic of Orthopaedy, Rheumatology and Dermatology St. Olavs Hospital Trondheim University Hospital Trondheim Norway
2. Department of Cancer Research and Molecular Medicine Faculty of Medicine Norwegian University of Science and Technology (NTNU) Trondheim Norway
3. Department of Pathology and Medical Genetics St. Olavs Hospital Trondheim University Hospital Trondheim Norway
4. Department of Dermatology University Hospital of North Norway Tromsø Norway
5. Department of Dermatology Facultad de Medicina Universidad Complutense Madrid Spain
6. Orthopaedic Research Centre Clinic of Orthopaedy, Rheumatology and Dermatology St. Olavs Hospital Trondheim University Hospital Trondheim Norway