3,4-Dihydroxyhydrocinnamate/Creatinine &#x7C; Urine &#x7C; Chemistry - non-challenge
3,4-dihydroxyhydrocinnamate/creatinine &#x7c; urine &#x7c; chemistry - non-challenge
3,4-Dihydroxyhydrocinnamate/Creatinine &#x7C; Urine &#x7C; Chemistry - non-challenge
3,4-dihydroxyhydrocinnamate/creatinine &#x7c; urine &#x7c; chemistry - non-challenge