title: Periodontal disease and serum citric acid levels in trisomy-21 (mongolism).
mesh_terms: D000293:Adolescent; D002951:Citrates / Q000097:blood*; D004314:Down Syndrome / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D010510:Periodontal Diseases / Q000097:blood* / Q000150:complications; D010512:Periodontal Index
chemical_list: D002951:Citrates