Strober, B., K. A. Papp, M. Flack, Y. Gu, E. H. Thompson, and W. C. Valdecantos. “Distribution of Improvements in Psoriasis Area and Severity Index from the Phase 2 Trial of Risankizumab in Moderate-to-Severe Plaque Psoriasis”. SKIN The Journal of Cutaneous Medicine, vol. 1, no. 3.1, Oct. 2017, p. s10, doi:10.25251/skin.1.supp.9.