title: Reply to the "letter to the editor" by Morfeld et al.
authors.forename: Otto H
authors.initials: OH
authors.lastname: Creutzenberg
authors.forename: Bernd
authors.initials: B
authors.lastname: Bellmann
authors.forename: Regina
authors.initials: R
authors.lastname: Korolewitz
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Koch
authors.forename: Inge
authors.initials: I
authors.lastname: Mangelsdorf
authors.forename: Thomas
authors.initials: T
authors.lastname: Tillmann
authors.forename: Dirk
authors.initials: D
authors.lastname: Schaudien
mesh_terms: D000818:Animals; D005260:Female; D008168:Lung / Q000737:chemistry*; D008297:Male; D053758:Nanoparticles / Q000737:chemistry* / Q000633:toxicity*; D052638:Particulate Matter / Q000737:chemistry* / Q000493:pharmacokinetics*; D020545:Respiratory Mucosa / Q000737:chemistry*
chemical_list: D052638:Particulate Matter