3-Hydroxy,4-Methoxybenzoate/Creatinine &#x7C; Urine &#x7C; Chemistry - non-challenge
3-hydroxy,4-methoxybenzoate/creatinine &#x7c; urine &#x7c; chemistry - non-challenge
3-Hydroxy,4-Methoxybenzoate/Creatinine &#x7C; Urine &#x7C; Chemistry - non-challenge
3-hydroxy,4-methoxybenzoate/creatinine &#x7c; urine &#x7c; chemistry - non-challenge