Lack of Pharmacokinetic and Pharmacodynamic Interactions Between a Smoking Cessation Therapy, Varenicline, and Warfarin: An In Vivo and In Vitro Study. - Burstein, Aaron H.; Clark, David J.; O'Gorman, Melissa; Willavize, Susan A.; Brayman, Timothy G.; Grover, G. Scott; Walsky, Robert L.; Obach, R. Scott; Faessel, Hélène M. (Journal of Clinical Pharmacology, 2007)