TY - RPRT TI - Simple and sensitive high-performance liquid chromatography method for simultaneous determination of urinary free cortisol and 6beta-hydroxycortisol in routine practice. For CYP 3A4 activity evaluation in basal conditions and after grapefruit juice intake. AU - E Rouits AU - M Boisdron-Celle AU - A Morel AU - E Gamelin PY - 2003 DO - 10.1016/s1570-0232(03)00353-2 UR - https://pubmed.ncbi.nlm.nih.gov/12906911/ ID - 12906911 ER -