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A factorial-design cluster randomised controlled trial investigating the cost-effectiveness of a nutrition supplement and an exercise programme on pneumonia incidence, walking capacity and body mass index in older people living in Santiago, Chile: the CENEX study protocol

Alan D Dangour*, Cecilia Albala, Cristian Aedo, Diana Elbourne, Emily Grundy, Damian Walker and Ricardo Uauy

Nutrition Journal 2007, 6:14  doi:10.1186/1475-2891-6-14

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