IL17A and asthma: Several endotyping and phenotyping strategies can be applied to define patients with Th17-high asthma, namely TAC3 gene signatures, 6GS, and IL-17 gene signatures alongside airway inflammation phenotyping (eosinophilic, mixed, neutrophilic, and paucigranulocytic) as described previously in this review (6, 8, 35, 38).