IL17A and asthma: Non‐eosinophilic asthma can be further sub‐divided into neutrophilic asthma patients with increased airway neutrophils and low eosinophils marked by elevated levels of Type 1 (IFN‐γ, TNF‐α) and Type 17 (IL‐17A, IL‐22) cytokines, or paucigranulocytic asthma patients with low levels of both eosinophils and neutrophils and a mixed inflammatory cytokine profile.4