ToxSci Advance Access originally published online on September 25, 2007
Toxicological Sciences 2008 101(1):181-182; doi:10.1093/toxsci/kfm250
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© The Author 2007. Published by Oxford University Press on behalf of the Society of Toxicology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
To the Editor

* Lovelace Respiratory Research Institute, Albuquerque, New Mexico 87108
University of New Mexico, College of Pharmacy, Albuquerque, New Mexico 87131
Received September 13, 2007; accepted September 17, 2007
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We appreciate the comments brought by Lison and Muller, as they not only reaffirm many of our major conclusions and caveats of the manuscript but they have given us an opportunity to clarify an important point regarding the nature of the carbon nanotubes (CNT) used. We found seven major points to the Letter to the Editor, and we have addressed each of them below. Recapitulations of the claims from Muller are shown in italics.
- (1) CNT used were nanofibers, not multiwalled carbon nanotubes (MWCNT). We concede that the magnified image shown in the manuscript
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