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Scholl TO, Hediger ML, Schall JI, Khoo C-S, Fischer RL
We wanted to oversample dual users, conduct a study that looked at the same group of participants over a long period of time, and see if we could learn anything about cigarette smokers and people who smoked both cigarettes and e-cigarettes. The study included 227 participants who were surveyed 13 times over two years
I originally thought this process looked intimidating but it's actually a pretty easy job that shouldn't take more than an hour, and more likely closer to 30 minutes if you read this how-to first
Department of Health and Human Services, Center for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health 2004
1492 Tobacco plant and smoking introduced to Europeans
