Once again, I was attacked by my colleagues, including two co-authors of the 2014 Surgeon General's report, for having the nerve to suggest that lifelong smokers of filtered cigarettes may have slightly lower lung cancer risk than lifetime smokers of non-filtered cigarettes.

If this study leads some smokers to smoke inside because they believe the researchers, who say that thirdhand smoke is no less harmful than secondhand smoke, then this could lead to serious public health harm to children.

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