American Journal of Epidemiology Advance Access originally published online on December 5, 2006
American Journal of Epidemiology 2007 165(2):231; doi:10.1093/aje/kwk100
American Journal of Epidemiology Copyright © 2006 by the Johns Hopkins Bloomberg School of Public Health All rights reserved; printed in U.S.A.
THE AUTHORS REPLY
Stefan Lönn1,
Anders Ahlbom1,
Helle C. Christensen2,
Christoffer Johansen2,
Joachim Schüz2,
Staffan Edström3,
Gert Henriksson4,
Jan Lundgren4,
Johan Wennerberg5 and
Maria Feychting1
1 Institute of Environmental Medicine, Karolinska Institutet, S-171 77 Stockholm, Sweden
2 Institute of Cancer Epidemiology, Danish Cancer Society, DK-2100 Copenhagen, Denmark
3 Department of Otorhinolaryngology, Sahlgrenska University Hospital, SE-413 35 Göteborg, Sweden
4 Department of Otorhinolaryngology, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
5 Department of Otorhinolaryngology/Head and Neck Surgery, Lund University Hospital, SE-221 85 Lund, Sweden
(e-mail: Stefan.Lonn{at}ki.se)
We thank Dr. Milham for his interest (1) in our study (2). Dr. Milham comments on only a small part of our paper, which needs to be put in the context of all the results presented. In the full paper, we offer a thorough discussion of the strengths, limitations, and potential biases of the study. These include statements that our findings are based on very small numbers (especially for long-term mobile phone use) and that cases with malignant tumors might have difficulties in remembering details about phone use. Our conclusions are based on all results in relation to such existing uncertainties. We also conclude in our paper that more epidemiologic studies including long-term users are clearly warranted.
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ACKNOWLEDGMENTS
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Conflict of interest: none declared.
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References
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- Milham S. (2007) Re: "Mobile phone use and risk of parotid gland tumor." (Letter). Am J Epidemiol 165:231.[Free Full Text]
- Lönn S, Ahlbom A, Christensen HC, et al. (2006) Mobile phone use and risk of parotid gland tumor. Am J Epidemiol 164:63743.[Abstract/Free Full Text]

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