title: Letter: Protein-sparing therapy.
mesh_terms: D000596:Amino Acids / Q000008:administration & dosage; D004040:Dietary Carbohydrates / Q000008:administration & dosage; D004041:Dietary Fats / Q000008:administration & dosage; D004044:Dietary Proteins / Q000008:administration & dosage; D006801:Humans; D009584:Nitrogen / Q000378:metabolism; D010288:Parenteral Nutrition; D011506:Proteins / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D011506:Proteins; D009584:Nitrogen