Interindividual and intraindividual variability of the urinary 6beta-Hydroxycortisol/Cortisol ratio in Chinese subjects: implications of its use for evaluating CYP3A activity.

Interindividual and intraindividual variability of the urinary 6beta-Hydroxycortisol/Cortisol ratio in Chinese subjects: implications of its use for evaluating CYP3A activity.