Stacie Bell1, Zaher Nahle2, Iannis E Adamopoulos3. 1. National Psoriasis Foundation, 6600 SW 92nd Ave # 300, Portland, OR 97223, USA. 2. Arthritis National Research Foundation, 19200 Von Karman Ave., Suite 350, Irvine, CA 92612, USA. 3. Division of Rheumatology, Allergy and Clinical Immunology, University of California, Davis, Sacramento, CA 95616, USA. Electronic address: iannis@ucdavis.edu.