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Statistical analysis Subjects were assigned to the PK population set (PK set) if they completed the use of the study product, had data for the critical time points in the plasma nicotine concentrationtime profiles, did not use a concomitant medication that rendered the concentration profile unreliable, and did not violate the protocol (major protocol deviation) in a way that might invalidate or bias the PK results

Li et al., 2025

Universities may consider adopting clearer policies on vaping within campus premises, increasing enforcement of smoke-free/vape-free zones, and offering cessation support programs tailored to young adults (39)

#1 I know this may be a faux pas, as this is a pipe site, but I digress