Figure 3.

Average particle size distribution in a typical perfusion experiment over entire exposure time (120 min), revealing an average size distribution of count median diameter of16.9 nm, GSD of1.6, aerosol concentration 4.45 10⁶ cm^-3, SD 0.13 10⁶ cm^-3 The example shown is from inhalation during histamine perfusion, as shown in Fig 3 (lower panel).