Fig. 1From: Airway inflammation after inhalation of nano-sized zinc oxide particles in human volunteersBoxplots of sputum parameters with at least one significant increase (p < 0.05). Fifty out of 92 measurements were below LOQ for IL-6. Significance level after Bonferroni correction is α = 0.0167. Asterisked p-values are statistically significantBack to article page