id	keyword
american_scientific_journal-2368	workers
american_scientific_journal-2368	heart
american_scientific_journal-2368	dust
american_scientific_journal-2368	blood
american_scientific_journal-2368	rate
american_scientific_journal-2368	pressure
american_scientific_journal-2368	non
american_scientific_journal-2368	group
american_scientific_journal-2368	exposure
american_scientific_journal-2368	study
american_scientific_journal-2368	cobblestone
american_scientific_journal-2368	health
american_scientific_journal-2368	journal