Comparison of two modes of vitamin B12supplementation on neuroconduction and cognitive function among older people living in Santiago, Chile: a cluster randomized controlled trial. a study protocol [ISRCTN 02694183]
Sánchez Hugo, Albala Cecilia, Lera Lydia, Castillo José, Verdugo Renato, Lavados Manuel, Hertrampf Eva, Brito Alex, Allen Lindsay, Uauy, Uauy Ricardo