is it bad to smoke tobacco without a filter Anyone joints filter? : r/trees is it bad to smoke
Description
New or Established
American Journal of Public Health 94(2):300-307
Not valid on samples, discovery sets, travel sizes or discounted products
For substances other than prescription psychotherapeutic drugs, respondents who had ever used the substance (e.g., marijuana) were asked to report when they first used the substance, and respondents who reported first use within a year of their current age were asked to report the year and month when they first used it
