title: A quantitative study on the relationship of salivary blood group substances to periodontal disease.
mesh_terms: D000017:ABO Blood-Group System; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007983:Lewis Blood Group Antigens; D008297:Male; D008875:Middle Aged; D009911:Oral Hygiene Index; D010510:Periodontal Diseases / Q000097:blood / Q000453:epidemiology* / Q000276:immunology; D010512:Periodontal Index; D012463:Saliva / Q000032:analysis* / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System; D007983:Lewis Blood Group Antigens