Apparently, the science no longer matters. You can acknowledge that a study does not allow you to determine the direction of a relationship, but then go ahead and draw such a conclusion anyway. Frankly, this is junk science, and it is just as bad as what we have attacked the tobacco industry for doing in years past.

A third major advantage of a clinical trial is that conditions are controlled as carefully as possible, minimizing potential biases. Both sampling and measurement bias are greatly reduced, if not eliminated. In contrast, survey studies are generally subject to significant sampling and measurement bias.

While the attacks were mostly personal, and not worthy of expounding here, the shred of substance was that more recent studies which compared lung cancer risks of successive cohorts of smokers have found increased risk among more recent cohorts. From these studies, the Surgeon General's report - and these co-authors - conclude that filters must convey an increased risk of cancer.

LAST：Acrylic Ecig Display Stand - stocked and sold by A&D company |NEXT：Patented disposable atomizer Air tank, e cigarette liquid 2.0ml capacity atomizer