1. Clinical Epidemiology Unit; Istituto Dermopatico dell'Immacolata (IDI)-IRCCS FLMM; Rome Italy
2. Division of Infection and Immunity; Department of Dermatology and Wound Healing; Cardiff University; Cardiff UK
3. Department of Pharmacy, Pharmacology and Postgraduate Medicine; School of Life & Medical Sciences; University of Hertfordshire; Hatfield UK
4. Department of Dermatology and Venereology; National Medical University; Kiev Ukraine
5. Department of Dermatology and Venereology; Skåne University Hospital; Lund University; Malmö Sweden
6. Health, Medical, and Neuropsychology Unit; Leiden University; Leiden The Netherlands
7. Oslo Centre for Biostatistics and Epidemiology; University of Oslo; Oslo Norway
8. Dali Medical, Dermatology; Bucharest Romania
9. Department of Dermatology; Alcañiz Hospital; Aragon Health Sciences Institute; Zaragoza Spain
10. Department of Dermatology; ULB Erasme Hospital; Brussels Belgium
11. Department of Medical Psychology; Radboud University Medical Center; Nijmegen The Netherlands
12. Department of Dermatology; Wroclaw Medical University; Wroclaw Poland
13. Department of Psychology; Aragon Health Sciences Institute; University of Zaragoza; Zaragoza Spain