- Quantitative determination by HPLC of urinary 6beta-hydroxycortisol, an indicator of enzyme induction by rifampicin and antiepileptic drugs. Roots, I., Holbe, R., Hövermann, W., Nigam, S., Heinemeyer, G., Hildebrandt, A.G. Eur. J. Clin. Pharmacol. (1979)









