Does E Cigarette Cause Cancer? Exploring Health Risks and Comparisons to Smoking SMOKO E Cigarettes E cigarette use and lung cancer screening uptake ecancer E cigarettes Cancer Grand Challenges Comparing the cancer potencies of emissions from vapourised nicotine products including e cigarettes with those of tobacco smoke Tobacco Control e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa