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However, since the filter replacement interval and performance maintenance vary depending on usage conditions, regular checks are essential in environments with cigarette smoke

So the investigators wanted to know how smoking affected male fertility (measured in the number of sperm and their percent motility), and whether or not the changes in fertility were correlated with levels of cadmium in the seminal fluid

Below is a chart that compiles the composite tax rate for cigarettes and other tobacco products

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Animal experiments were approved by the committee on Animal Care at th Jikei University and performed in accordance with institutional guidelines