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Whether e-cigarette use precedes smoking or smoking precedes e-cigarette use is a critical question, but it is one which needs to be answered through longitudinal research. We need studies that follow the trajectory of teen tobacco/e-cigarette use over time. That is the only way to determine which comes first.

In a grant proposal that was subsequently funded by the state of California's Tobacco-Related Disease Research Program (TRDRP), Dr. Manuela Martin-Greens and colleagues from the University of California, Riverside exhibited their fortune-telling skills, claiming to know the results of their proposed lab experiments on mice before actually performing the studies.

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