1. Centre for Evidence-Based Healthcare; Medizinische Fakultät Carl Gustav Carus; TU Dresden; Dresden Germany
2. Centre of Evidence Based Dermatology; University of Nottingham; Nottingham U.K
3. Department of Dermatology; Northwestern University; Chicago IL U.S.A
4. Medical Sociology; Institute of Epidemiology and Preventive Medicine; University of Regensburg; Regensburg Germany
5. Department for Development, Research and Health Technology Assessment; Agency for Quality and Accreditation in Health Care and Social Welfare; Zagreb Croatia
6. Department of Dermatology; University Hospital Carl Gustav Carus; Dresden Germany
7. Department of Dermatology; AP-HP; Hôpitaux Universitaires Henri Mondor; Créteil France
8. Université Paris-Est Créteil; Créteil France
9. Satellite Français du Cochrane Skin Group; France
10. EA EpiDermE; INSERM Créteil; Créteil France
11. Division of Epidemiology and Public Health; School of Medicine; University of Nottingham; Nottingham U.K
12. Department of Dermatology and Allergy; Charité - Universitätsmedizin Berlin; Berlin Germany
13. 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
14. Centre for Research in Environmental Epidemiology (CREAL); Barcelona Spain
15. IMIM (Hospital del Mar Medical Research Institute); Barcelona Spain
16. Universitat Pompeu Fabra (UPF); Barcelona Spain
17. CIBER Epidemiología y Salud Pública (CIBERESP); Barcelona Spain
18. VU University Medical Center; Department of Epidemiology and Biostatistics; the EMGO Institute for Health and Care Research; Amsterdam the Netherlands
19. Derby Teaching Hospitals NHS Foundation Trust; Derby U.K
20. Department of Dermatology, Venereology, and Allergology; J.W. Goethe-University, Hospital; Frankfurt Germany
21. Evidence-Based Medicine Frankfurt; Institute for General Practice; Goethe-University; Frankfurt Germany
22. Department of Dermatology, Venerology and Allergy; Allergie-Centrum-Charité; Charité - Universitätsmedizin Berlin; Berlin Germany
23. Department of Dermatology, Venerology and Allergy; Division of Evidence Based Medicine (dEBM); Charité - Universitätsmedizin Berlin; Berlin Germany
24. Centre of Wound Healing; Departments of Dermatology, Venereology, Allergology and Immunology; Dessau Medical Center; Dessau Germany