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Joint trajectories of smoking and perceived self-control: Group HL (chronic cigarette smoking and low perceived self-control); Group LL (infrequent or non-cigarette smoking and low perceived self-control); Group MM (chronic moderate cigarette smoking and moderate perceived self-control); Group LM (infrequent or non-cigarette smoking and moderate perceived self-control); Group LH (infrequent or non-cigarette smoking and high perceived self-control).
