Fearon, Ian M., Mitch Nides, Alison Eldridge, Oscar M. Camacho, James Murphy, and Christopher J. Proctor. “A Pharmacokinetic Study to Examine Nicotine Delivery from E Cigarettes and a Conventional Cigarette in Healthy Subjects During a Brief Period of Ad Libitum Use”. International Journal of Clinical Trials 4, no. 4 (October 26, 2017): 131–138. Accessed April 21, 2026. https://www.ijclinicaltrials.com/index.php/ijct/article/view/249.