Fig. 4From: Use of a vibrating mesh nebulizer for allergen challengeSolo® allergen PD20 on the vertical axis and Solo® Methacholine PD20 × STE on the horizontal axis plotted on a log scale. The regression equation is; Log Allergen PD20 (units) = − 0.62 + 0.56 × log (Methacholine PD20 [μg] × STE [units/mL])Back to article page