Fig. 2From: Heterogeneous deposition of regular and mentholated little cigar smoke in the lungs of Sprague-Dawley ratsAveraged particle size distributions of regular and mentholated little cigar smoke measured by SMPS. For each flavor, exposure experiments were conducted separately for male and female rats due to the limited capacity of the exposure chamber. Each dot represents the average particle number concentration at a given particle size over 2Â h measurement. Standard deviation was not indicated in the figure to aid clear visualization of the curvesBack to article page