This article refers to:
Tobias Meißner, Annegret Potthoff, and Volkmar Richter
The publishers would like to apologise for an error that occurred in a recent supplement of Inhalation Toxicology, 2009; 21(S1): 35–39
Due to a typesetting error the keywords should have read as follows:
Keywords: nanoparticles; toxicity; TiO2; characterization; suspension