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Improvement of critically ill patients with different nutritional formulae. (A) Improvement of AST after 3 days of enteral nutrition; (B) improvement of ALT after 3 days of enteral nutrition; (C) improvement of NRS2002 after 7 days of enteral nutrition. N=301. *P<0.05, **p<0.01. ALT, alanine aminotransferase; AST, aspartate aminotransferase; NRS2002, Nutrition Risk Screening 2002; PB, peptide-based formulae; PW, peptide step to whole protein formulae; WP, whole protein formulae.
