Recently, 1 single nucleotide polymorphism (SNP) in the mucin 5B gene, rs35705950, and 3 neighboring SNPs in the toll-interacting protein (TOLLIP) variants (rs3750920, rs111521887, and rs5743894) have been reported to be associated with increased susceptibility to fibrosing HP (chronic HP) in Portugal.15 This evidence concerns the gene TOLLIP and hypersensitivity pneumonitis.