American Journal of Epidemiology Advance Access originally published online on August 27, 2008
American Journal of Epidemiology 2008 168(9):1093; doi:10.1093/aje/kwn245
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American Journal of Epidemiology © The Author 2008. Published by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.
LETTERS TO THE EDITOR |
The Authors Reply
1 Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, MA 02115
2 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, S-171 77 Stockholm, Sweden
(e-mail: evillamo@hsph.harvard.edu)
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We thank Smits and Hukkelhoven (1) for their insight into the positive, linear association between interpregnancy interval and the risk of cleft palate in Sweden and their comments