The study titled, “Cigarette smokers’ concurrent use of smokeless tobacco: dual use patterns and nicotine exposure,” looked into the patterns of dual users’ product use and nicotine exposure on days when they used cigarettes exclusively (single use) versus days when they consumed both cigarettes and SLTs (dual use). Forty-six dual users (cigarettes and SLTs) recorded their product use behaviours in real time via ecological momentary assessment for a 2-week longitudinal design, answering questions related to situational factors (eg. location, mood) using this same diary. [...]