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While some involved first-time users and just a few puffs, others were experienced users

Cigarettes, e-cigarettes and tobacco products contain many toxic chemicals, as do their smoke, vapor and liquids

A buyer's premium of 25% will be added to the final hammer price of each lot purchased directly through Alexander Historical Auctions and a buyer's premium of 30% will be added to lots sold through any other third-party bidding platform, i.e

Statistical analyses Statistical analyses were performed using SurfStat (www.math.mcgill.ca/keith/surfstat) for local cortical thickness analyses and with SPSS 20 (SPSS, Chicago, IL, USA) for all other analyses