A MUC5B–TOLLIP haplotype was associated with reduced survival in fibrotic hypersensitivity pneumonitis (HR 6.92, p = 0.006), while in IPF, another MUC5B–TOLLIP haplotype appeared to be protective (HR 0.37, p = 0.009) (25, 26). The gene discussed is MUC5B; the disease is idiopathic pulmonary fibrosis.