1. Oregon Medical Research Center; Portland OR U.S.A
2. Siaal Research Center for Family Medicine and Primary Care; Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva Israel
3. Department of Quality Measurements and Research; Chief Physician's Office; Clalit Health Services; Tel Aviv Israel
4. Department of Dermatology; Hospital de la Santa Creu i Sant Pau; Universitat Autònoma de Barcelona; Barcelona Spain
5. Dermatrials Research Inc.; 132 Young Street Hamilton ON Canada L8N 1V6
6. International Psoriasis Council; St Louis MO U.S.A
7. Department of Dermatology; Kaiser Permanente Los Angeles Medical Center; 1515 North Vermont Avenue, 5th Floor Los Angeles CA 90027 U.S.A