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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
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* Corresponding author: Alan D Dangour alan.dangour@lshtm.ac.uk
Nutrition Journal 2007, 6:14 doi:10.1186/1475-2891-6-14