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Hänggi, Matthias; Ypparila-Wolters, Heidi; Bieri, Christine; Steiner, Carola; Takala, Jukka; Korhonen, Ilkka; Jakob, Stephan M (2008). Entropy and bispectral index for assessment of sedation, analgesia and the effects of unpleasant stimuli in critically ill patients: an observational study. Critical care, 12(5), R119. London: BioMed Central 10.1186/cc7015
