1. Department of Dermatology and Allergy Charité‐Universitätsmedizin Berlin Berlin Germany
2. Center for Evidence‐based Healthcare Medizinische Fakultät Carl Gustav Carus Dresden Germany
3. Department of Dermatology Northwestern University Chicago IL U.S.A.
4. Institute for Social Medicine and Epidemiology University of Lübeck Germany
5. University Centre for Nursing and Midwifery Department of Public Health Ghent University Ghent Belgium
6. Department of Dermatology Academic Medical Center Amsterdam the Netherlands
7. Centre of Evidence Based Dermatology University of Nottingham Nottingham U.K.
8. Department of Biostatistics University of Liverpool Liverpool U.K.
9. Department of Dermatology The Pennsylvania State University College of Medicine Hershey PA U.S.A.
10. Department of Dermatology Zealand University Hospital Roskilde Denmark