title: ABH non-secretor status, blood group O, and chronic airflow limitation.
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D005541:Forced Expiratory Volume; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000235:genetics* / Q000503:physiopathology; D010437:Peptic Ulcer / Q000235:genetics; D012306:Risk; D012463:Saliva / Q000276:immunology; D012907:Smoking
chemical_list: D000017:ABO Blood-Group System