Clin. nutr. Clin. nutr. A retrospective study about the influence of early nutritional support on mortality and nosocomial infection in the critical care setting Serón-Arbeloa C Universidad de Zaragoza Puzo-Foncillas J Universidad de Zaragoza Garcés-Gimenez T Escós-Orta J Labarta-Monzón L Universidad de Zaragoza Lander-Azcona A 2011 research-article