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However, this experimental design introduced a confounding variable: the low-power (15 W and 25 W) and high-power (50 W) conditions required two different types of atomizer technologies and, therefore, the atomizer designs, resistance values, and other characteristics varied between them
And you remember their names
And that makes the comparison to smoking far shakier
The benefits to households that grow tobacco are also limited, and recent studies have illustrated the detrimental economic impact of tobacco growing on most households (see table 1)
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