title: The biochemical evaluation of the nutrition status of urban school children: nicotinic acid status.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D044383:Black People; D002648:Child; D003404:Creatinine / Q000652:urine; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D009536:Niacinamide; D009539:Nicotinic Acids; D009749:Nutrition Surveys; D011728:Pyridones / Q000652:urine; D012737:Sex Factors; D013019:South Africa; D044465:White People
chemical_list: D009539:Nicotinic Acids; D011728:Pyridones; D009536:Niacinamide; D003404:Creatinine