- Campbell ME, Spielberg SP, Kalow W: A urinary metabolite ratio that reflects systemic caffeine clearance. Clin Pharmacol Ther. 1987 Aug;42(2):157-65. doi: 10.1038/clpt.1987.126. [PubMed:3608349 ]
- Jeppesen U, Loft S, Poulsen HE, Brsen K: A fluvoxamine-caffeine interaction study. Pharmacogenetics. 1996 Jun;6(3):213-22. doi: 10.1097/00008571-199606000-00003. [PubMed:8807660 ]
- Grant DM, Tang BK, Kalow W: Variability in caffeine metabolism. Clin Pharmacol Ther. 1983 May;33(5):591-602. doi: 10.1038/clpt.1983.80. [PubMed:6687705 ]