@DrGilchrist @gfong570 If we are looking for comparable cross sectional studies, does this one from Korea raise concerns at all? Half of HTP users there also smoked cigs in the past 30 days. https://t.co/EnxXY3WUNi

@DrGilchrist @GregTHR @ZachCahn @mjstoklosa @ITCProject Europe is showing a similar pattern where HTP use predominates as dual use among current smokers. https://t.co/ayuKQY8b9x