Frontiers Nicotine free electronic vape fluid stimulates angiogenic processes in vitro through ARF6 mediated oxidative stress Health impact of E cigarettes: a prospective 3.5 year study of regular daily users who have never smoked Scientific Reports Chronic Exposure to Both Electronic and Conventional Cigarettes Alters Ileum and Colon Turnover, Immune Function, and Barrier Integrity in Mice A randomised controlled single centre open label pharmacokinetic study to examine various approaches of nicotine delivery using electronic cigarettes Scientific Reports