TY - RPRT TI - Extractionless method for the simultaneous high-performance liquid chromatographic determination of urinary caffeine metabolites for N-acetyltransferase 2, cytochrome P450 1A2 and xanthine oxidase activity assessment. AU - A Nyéki AU - J Biollaz AU - U W Kesselring AU - L A Décosterd PY - 2001 DO - 10.1016/s0378-4347(00)00616-2 UR - https://pubmed.ncbi.nlm.nih.gov/11393735/ ID - 11393735 ER -