1. University Hospital Carl Gustav Carus; Department of Dermatology; Technical University Dresden Fetscherstr. 74 Dresden Germany 01307
2. University of Bristol; School for Policy Studies; 8 Priory Road Bristol UK BS8 1TZ
3. University Medical Center Groningen; Department of Dermatology; Groningen Netherlands 9700 RB
4. Friedrich Schiller University; Department of Dermatology and Allergology; Erfurter Strasse 35 Jena Germany D 07743
5. Queen's Medical Centre; Department of Dermatology; University Hospital NHS Trust Derby Road Nottingham UK NG7 2UH
6. The University of Nottingham; Centre of Evidence Based Dermatology; Queen's Medical Centre Derby Road Nottingham UK NG7 2UH