Open Access Research

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

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