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However, marijuana use remains illegal at the federal level, which has complicated efforts to research the long-term effects of the drug

Smoking hemp delivers CBD quickly into the bloodstream compared to oral methods

Mainstream smoke is the smoke that is released into the air when a cigarette is drawn and inhaled, whereas sidestream smoke is the smoke that is emitted from the end of a burning cigarette (Lynne Eldridge)

Since smoking status was determined based on a one-time questionnaire, there may be significant recall bias and underreporting as well as changes in smoking intensity over time that are not reflected in our estimation of total PY