Media type: E-Article Title: Ultrafine Particles: Geiser et al. Respond Contributor: Geiser, Marianne; Rothen-Rutishauser, Barbara; Kapp, Nadine; Gehr, Peter; Schürch, Samuel; Kreyling, Wolfgang; Schulz, Holger; Semmler, Manuela; Heyder, Joachim; Hof, Vinzenz Im imprint: Environmental Health Perspectives, 2006 Published in: Environmental Health Perspectives Language: English DOI: 10.1289/ehp.114-a212 ISSN: 0091-6765 Keywords: Health, Toxicology and Mutagenesis ; Public Health, Environmental and Occupational Health Origination: Footnote: Access State: Open Access