title: Respiratory symptoms, lung function, and IgG4 levels against pig antigens in a sample of Dutch pig farmers.
mesh_terms: D000328:Adult; D000368:Aged; D000382:Agricultural Workers' Diseases / Q000276:immunology* / Q000503:physiopathology; D000822:Animal Husbandry; D000818:Animals; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D008875:Middle Aged; D012129:Respiratory Function Tests; D012140:Respiratory Tract Diseases / Q000276:immunology* / Q000503:physiopathology; D011795:Surveys and Questionnaires; D013552:Swine / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G