The benefits of electronic cigarettes are clear: they help many smokers to quit smoking. They are especially advantageous to smokers who have failed to quit using traditional methods. Taking these products off the market is essentially condemning many smokers to continued smoking by taking away a viable option for them to try to kick the addiction.

The authors admit this in the paper. They write: "This is a cross-sectional study, which only allows us to identify associations, not causal relationships."

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