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Unlike traditional cigarettes that involve tobacco combustion, ECs use heat to transform the liquid (known as e-liquid) into an inhalable aerosol

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Each of the sessions lasted for 4 hours, containing either air mixed with aerosol from e-cigarette users or clean filtered air, and occurred 2 weeks apart, in order to eliminate any carryover effects

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Patients with the following features were excluded ( Figure 1 ): patients diagnosed with pancreatic cancer within 2 years after the onset of CP ( Figure 1 Thus, patients with 30 or more pack-years of smoking history were defined as the smoking patients