To illustrate this, let's consider the five studies which the authors cite as providing evidence that electronic cigarettes inhibit smoking cessation.

The truth is that there are major advantages and disadvantages of both surveys and clinical trials to examine the potential benefits of electronic cigarettes. Both types of study designs have inherent biases which can produce results that are more "favorable" or "unfavorable." This is why the methodology of published research needs to be examined so carefully. It is not so simple as to dismiss RCT evidence and accept survey evidence. One needs to consider the strengths and limitations inherent in both approaches. And at the end of the day, the only defensible approach, I believe, is that both types of studies are necessary, and we must carefully interpret and synthesize the findings from studies of multiple designs, using the totality of the evidence to make final judgments about the benefits of electronic cigarettes.

A issued by UC Riverside states unequivocally that this research finds thirdhand smoke to be every bit as harmful as active smoking.

LAST：Hot selling 510 thread atomizer 510 oil vaporizer cartridge |NEXT：Hangsen top quality ego ce4 ecig 650mah, 900mah, or 1100mah