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  • Clinical chemistry reagents intended to perform qualitative and/or quantitative analyses on a body fluid sample (typically urine) to determine homovanillic acid (HVA), a catecholamine metabolite from the hormone dopamine. Increased levels of urinary HVA are found in patients with catecholamine-secreting tumors, particularly neuroblastomas. Determination of vanillylmandelic acid is frequently performed using high-pressure liquid chromatography techniques.
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