1. Siaal Research Center for Family Medicine and Primary Care; Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva Israel
2. Department of Quality Measurements and Research; Chief Physician's Office, Clalit Health Services; Tel Aviv Israel
3. Department of Dermatology; Kaiser Permanente Los Angeles Medical Center; Los Angeles CA U.S.A.
4. Department of Dermatology; Hospital de la Santa Creu i Sant Pau; Universitat Autònoma de Barcelona; Barcelona Spain
5. University of Rome Tor Vergata; Rome Italy
6. Dermatrials Research Inc. & Venderm Innovations in Psoriasis; Hamilton ON Canada
7. Department of Dermatology; Apollo Hospitals; Chennai India
8. Department of Dermatology; University of São Paulo; São Paulo Brazil
9. Clínica Dermacross; Santiago Chile
10. Department of Dermatology and Allergy, Herlev and Gentofte Hospital; University of Copenhagen; Copenhagen Denmark
11. The University of Manchester; Manchester Academic Health Science Centre; Manchester U.K.
12. Department of Dermatology; Salford Royal NHS Foundation Trust; Manchester U.K.
13. Skin & Cancer Foundation Inc.; Carlton Vic. Australia
14. Department of Dermatology; The University of Melbourne; Melbourne Vic. Australia
15. St Vincent's Hospital; Melbourne Vic. Australia
16. International Psoriasis Council; St Louis MO U.S.A.
17. Department of Dermatology; Azienda Ospedaliera Papa Giovanni XXIII; Bergamo Italy
18. Deptartment of Dermatology; Erasmus MC; P.O. Box 5201 3008 AE Rotterdam the Netherlands
19. Oregon Medical Research Center; Portland OR U.S.A.