ERBB2 and psoriasis: Affibody-based HER2 binders have been used in the clinic for visualization of HER2 expression in metastatic breast cancer [15,16], C5 complement binders have been used for treatment of inflammatory diseases (NCT02083666), and interleukin-17A (IL-17A) binders have been used for treatment of psoriasis (NCT02690142).