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American Journal of Epidemiology Advance Access originally published online on December 7, 2005
American Journal of Epidemiology 2006 163(4):393-394; doi:10.1093/aje/kwj043
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American Journal of Epidemiology Copyright © 2005 by the Johns Hopkins Bloomberg School of Public Health All rights reserved; printed in U.S.A.

Letter to the Editor

THE AUTHORS REPLY

Ninez A. Ponce1,2, Katherine J. Hoggatt3, Michelle Wilhelm3 and Beate Ritz3,4

1 Department of Health Services, School of Public Health, University of California at Los Angeles, Los Angeles, CA 90095
2 Center for Health Policy and Research, School of Public Health, University of California at Los Angeles, Los Angeles, CA 90095
3 Department of Epidemiology, School of Public Health, University of California at Los Angeles, Los Angeles, CA 90095
4 Department of Environmental Health Sciences, School of Public Health, University of California at Los Angeles, Los Angeles, CA 90095

e-mail: nponce@ucla.edu

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We thank Drs. Shukunami, Nishijima, and Kotsuji for their comments (1Go) on our article (2Go) and agree that making exclusions can lead to selection bias, a potentially serious threat to the validity of our inferences. . . . [Full Text of this Article]


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