Based on this single study, Dr. Glantz concludes: "the FDA must be extremely careful about assuming that e-cigarettes uniformly pose less risk than conventional cigarettes."

Anecdotes are in fact data. Of course, what you do with that data and how you interpret it is affected by the nature of how the data were obtained. But anecdotes are data. Remember, the connection between smoking and lung cancer itself was first uncovered by a case series. Physicians started to note multiple cases of lung cancer - which was very rare at the time - all occurring in smokers. While these patients could be called "anecdotes," they were also people who provided very real and important data that led to the discovery that smoking causes lung cancer. That connection would not have been found had these "anecdotes" been dismissed.

These results, while preliminary, provide initial evidence that electronic cigarettes may serve not only as a means of helping smokers to quit, but also of helping them to eventually become free of nicotine addiction.

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