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3. Enteral nutrition in the critically ill patient: a critical review of the evidence;Heyland;Intensive Care Med,1993
4. Death, morbidity and economics are the only end points for trials;Koretz;Proc Nutr Soc,2005
5. The impact of early nutrition on metabolic response and postoperative ileus;Correia;Curr Opin Clin Nutr Metab Care,2004