Nicotinic acid assay in blood and urine.
D001681:Biological Assay; D001826:Body Fluids; D009525:Niacin / Q000097:blood* / Q000652:urine*; D009539:Nicotinic Acids
D009539:Nicotinic Acids; D009525:Niacin
NICOTINIC ACID/blood; NICOTINIC ACID/urine