Several tobacco-product manufacturers challenged the constitutionality of a Massachusetts statute that required annual disclosure of ingredients lists and nicotine yields for all cigarettes, snuff, and chewing tobacco sold within the state to the state public health department.  These disclosures subsequently may be released by the department to the public to mitigate risks to public health.  The manufacturers argued that the statute was preempted by federal laws regulating the labeling and advertising of tobacco products, which included anonymous federal ingredient reporting requirements. The Court held that the state statute was not expressly or impliedly preempted because, among other things:  (1) it did not regulate the advertising or promotional activities of tobacco companies by requiring them to provide information directly to the public; (2) it did not frustrate either the federal labeling requirements or the national uniformity of advertising regulations; and (3) the federal regulations did not demonstrate an intent to protect tobacco ingredients from disclosure throughout the nation or to inhibit states from collecting information about tobacco additives.