MUC5AC immunostaining was also increased in asthma compared to health (P = 0.030; Fig 1G, data in S5 Table and Fig B in S2 Fig), again driven by severe asthma (P = 0.034 for severe asthma compared to healthy controls; Fig 1H, data in S6 Table). The gene discussed is MUC5AC; the disease is asthma.