IL17A and psoriasis: Interestingly, dual targets have previously been trialled for psoriasis (IL-17 with \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\hbox {TNF}_{\alpha }$$\end{document}TNFα)40.