A 50% reduction in the Psoriasis Area and Severity Index (PASI 50) is a clinically significant endpoint in the assessment of psoriasis.
Carlin, Christopher S. MD a,*; Feldman, Steven R. MD, PhD b; Krueger, James G. MD c; Menter, Alan MD d; Krueger, Gerald G. MD a
Journal of the American Academy of Dermatology.
50(6):859-866, June 2004.
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