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Comparison of two modes of vitamin B12 supplementation on neuroconduction and cognitive function among older people living in Santiago, Chile: a cluster randomized controlled trial. a study protocol [ISRCTN 02694183]

Hugo Sánchez*, Cecilia Albala, Lydia Lera, José Luis Castillo, Renato Verdugo, Manuel Lavados, Eva Hertrampf, Alex Brito, Lindsay Allen and Ricardo Uauy

Nutrition Journal 2011, 10:100  doi:10.1186/1475-2891-10-100

Pre-publication versions of this article and reviewers' reports

Reviewer's Report Robert Clarke 16 May 2011
Reviewer's Report Mary Ann Johnson 17 May 2011
Reviewer's Report Alan Dangour 05 Aug 2011
Reviewer's Report Mary Ann Johnson 06 Aug 2011
Resubmission - Version 3 Manuscript Author's comment 12 Sep 2011
Editorial acceptance 16 Sep 2011
Published 27 Sep 2011