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Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan

  • Junko Ishihara1, 2,
  • Seiichiro Yamamoto3,
  • Hiroyasu Iso2, 4,
  • Manami Inoue1,
  • Shoichiro Tsugane1Email author and
  • the JPHC FFQ Validation Study Group
Nutrition Journal20054:26

DOI: 10.1186/1475-2891-4-26

Received: 12 July 2005

Accepted: 05 October 2005

Published: 05 October 2005

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Open Peer Review reports

Pre-publication versions of this article and author comments to reviewers are available by contacting info@biomedcentral.com.

Original Submission
12 Jul 2005 Submitted Original manuscript
Resubmission - Version 2
Submitted Manuscript version 2
6 Sep 2005 Author responded Author comments - Junko Ishihara
Resubmission - Version 3
6 Sep 2005 Submitted Manuscript version 3
14 Sep 2005 Author responded Author comments - Junko Ishihara
Resubmission - Version 4
14 Sep 2005 Submitted Manuscript version 4
4 Oct 2005 Author responded Author comments - Junko Ishihara
Resubmission - Version 5
4 Oct 2005 Submitted Manuscript version 5
Publishing
5 Oct 2005 Editorially accepted
5 Oct 2005 Article published 10.1186/1475-2891-4-26

How does Open Peer Review work?

Open peer review is a system where authors know who the reviewers are, and the reviewers know who the authors are. If the manuscript is accepted, the named reviewer reports are published alongside the article. Pre-publication versions of the article and author comments to reviewers are available by contacting info@biomedcentral.com. All previous versions of the manuscript and all author responses to the reviewers are also available.

You can find further information about the peer review system here.

Authors’ Affiliations

(1)
Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center
(2)
Department of Public Health Medicine, Majors of Medical Sciences, Graduated School of Comprehensive Medical Sciences, University of Tsukuba
(3)
Statistics and Cancer Control Division, Research Center for Cancer Prevention and Screening, National Cancer Center
(4)
Public Health, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University

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