Letter to the Editor: regarding “Letter from Tsuda et al.”
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PII: S1047-2797(09)00087-8
doi:10.1016/j.annepidem.2009.03.013
© 2009 Elsevier Inc. All rights reserved.
PII: S1047-2797(09)00087-8
doi:10.1016/j.annepidem.2009.03.013
© 2009 Elsevier Inc. All rights reserved.