It's not clear to me why researchers who oppose electronic cigarettes are so anxious to condemn these products that they are willing to use inappropriate research designs to fulfill such an aim.

grants and research papers, and also those publishing such papers, to be accountable."

The basic framework that the FDA has proposed to regulate e-cigarettes is that every product on the market (except a very few that were already on the market as of February 2007) must submit a new product application. These applications must demonstrate to the FDA that the introduction of the product to the market is appropriate for the public's health.

In other words, despite acknowledging that they cannot tell from their study whether e-cigarette use precedes smoking or whether smoking precedes e-cigarette use, they nonetheless draw the conclusion that e-cigarette use precedes smoking.

The complete quote from this article:

LAST：USB Ego T battery,Pen style EGO T |NEXT：Ecigator Ecig, 15W Output Ecigator CE4, VV VW Mod Ecigator Ecig