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Relationship between CO and (a) formaldehyde, (b) acetaldehyde, (c) acrolein, and (d) glyoxal in e-cigarette aerosols. Cig-a-like e-cigarette was tested using tobacco (T) and grape (F) flavored e-liquids. Fruit flavored e-liquids were used for top-coil, ‘mod’, and JUUL e-cigarettes.
