4-Hydroxybenzoate/Creatinine &#x7C; Urine &#x7C; Drug toxicology
4-hydroxybenzoate/creatinine &#x7c; urine &#x7c; drug toxicology
4-Hydroxybenzoate/Creatinine &#x7C; Urine &#x7C; Drug toxicology
4-hydroxybenzoate/creatinine &#x7c; urine &#x7c; drug toxicology