Carcinogenesis Advance Access originally published online on January 24, 2008
Carcinogenesis 2008 29(9):1851; doi:10.1093/carcin/bgn022
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Reply: Letter to the editor in response to Morton et al. (2007) Carcinogenesis, 28, 1759–1764
The Personal Care Products Council, Washington, DC, USA
1 The Procter & Gamble Company, Cincinnati, OH, USA
* To whom correspondence should be addressed. Tel: +202 331 1770; Fax: +202 331 1969;Email: baileyj@personalcarecouncil.org
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We read the recent article by Morton et al. (2007) with great interest (1). In this article, the authors examined non-Hodgkin lymphoma (NHL) risk in relation to reported hair dye use in a large US population-based case–control study. No overall association between reported use of hair dyes and NHL was found for either women [odds ratio (OR) = 1.2, 95% confidence interval (CI) = 0.9–1.6)] or men (OR = 0.9, 95% CI = 0.6–1.2). Analysis by type of product also showed no association between use of permanent hair dyes and NHL in either women (OR = 1.1, 95% CI = 0.8–1.6) or men (OR