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Using information from the table, explain which source contributes most to this effect

These products still expose the body to nicotine and other harmful substances that can interfere with normal immune function and lead to oral disease and cancer

However, B&W continued to conduct research on smokeless use, 38 and found links between flavours and initiation similar to other companies

Wikipedia claims it is a "perennial cable favourite", and it's true: I can't stop myself from watching it whenever it's on, at whatever point I catch it

And based on their list of dip tobacco elements, theres no indication that fiberglass is present