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As far as sleep stages, it seems that the N3 stage or slow-wave sleep is decreased in smokers, while the N1 and N2 stages are increased, changes that seem to be dose dependent, as they are more evident to heavy smokers compared to mild smokers, or to current smokers compared to former smokers [5,80,85,108]

how old do you have to be to vape in Washington

Notice what your doing

The study will be another data point for the public health community and policymakers in deciding how to handle e-cigarettes
It doesnt have to be water, though
