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The highest proportion to nominate this design was found among current smokers (55%), followed by females (51%) and current snus users (50%)
Here, we conduct a narrative review of existing literature on EC use by PWNS and respiratory outcomes, defined as broadly as possible
These measures include inspecting the raw tobacco for contaminants, monitoring moisture levels during curing, and testing the final cigarettes for consistency in flavor, burn rate, and nicotine content
The biased uncertainty of each measurement method was based on previous studies, specifically 3% uncertainty in particle mobility diameter by DMA classification 68 , 4.7% uncertainty in particle aerodynamic diameter by AAC classification 69 , 2.8% uncertainty in particle mass by CPMA classification 70 and 10% uncertainty in particle concentration using a CPC 71