IL23A and Erythema: The IL‐23‐induced mouse model has been traditionally considered to resemble human psoriasis by exhibiting largest transcriptomic homology with human psoriasis among existing “psoriasis‐like” mouse models (Suarez‐Farinas et al, 2013), and direct administration of IL‐23 results in erythema, mixed dermal infiltrate and epidermal hyperplasia associated with parakeratosis (Chan et al, 2006).