Kotz, D., Simpson, C., Viechtbauer, W., van Schayck, O. C. P., West, R., & Sheikh, A. (2014). Cardiovascular and neuropsychiatric safety of varenicline and bupropion compared with nicotine replacement therapy for smoking cessation: Study protocol of a retrospective cohort study using the QResearch general practice database. BMJ Publishing Group.

Kotz, Daniel, Colin Simpson, Wolfgang Viechtbauer, Onno C P. van Schayck, Robert West, και Aziz Sheikh. Cardiovascular and Neuropsychiatric Safety of Varenicline and Bupropion Compared With Nicotine Replacement Therapy for Smoking Cessation: Study Protocol of a Retrospective Cohort Study Using the QResearch General Practice Database. BMJ Publishing Group, 2014.

Kotz, Daniel, et al. Cardiovascular and Neuropsychiatric Safety of Varenicline and Bupropion Compared With Nicotine Replacement Therapy for Smoking Cessation: Study Protocol of a Retrospective Cohort Study Using the QResearch General Practice Database. BMJ Publishing Group, 2014.