AKI	Acute kidney injury
ARDS	Acute respiratory distress syndrome
CKD	Chronic kidney disease
CRRT	Continuous renal replacement therapy
CVVHD	Continuous venovenous hemodialysis
CVVH	Continuous venovenous hemofiltration
EN	Enteral nutrition
FAO	Food and Agriculture Organization
FGF23	Fibroblast growth factor 23
ICU	Intensive care unit
IS	Indoxyl sulfate
PCS	p-cresyl sulfate
PDCAAS	Protein Digestibility Corrected Amino Acid Score
PEW	Protein-energy wasting
RRT	Renal replacement therapy
ROS	Reactive oxygen species
SCFAs	Short-chain fatty acids
TMAO	Trimethylamine N-oxide
UNU	United Nations University
WHO	World Health Organization