We want to learn if dual users' dependence levels differ from each other and also from exclusive e-cigarette or cigarette users. Perhaps most critically, the same PATH participants will be surveyed on an ongoing basis, and the results of future waves of data will show if experimental e-cigarette users eventually are converted to regular cigarette users
About This PDQ Summary About PDQ Physician Data Query (PDQ) is the National Cancer Institute's (NCI's) comprehensive cancer information database
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For example, we know that the indigenous people of the Americas, North, Central and South, before the arrival of Europeans, did not consume refined sugar or even salt in their diet
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