Lipid subclasses identified in liver biopsies of NAFLD patients and healthy controls based on targeted and untargeted analyses of fatty acids and esterified lipids. Abbreviations: FA: fatty acids, Cer: ceramides, SM: sphingomyelins, LPC: monoacylglycerophosphocholines, LPE: monoacylglycerophosphoethanolamines, PC: diacylglycerophosphocholines, PE: diacylglycerophosphoethanolamines, PE-O: 1-alkyl,2-acylglycerophosphoethanolamines, PG: diacylglycerophosphoglycerols, PI: diacylglycerophosphoinositols, PS: diacylglycerophosphoserines, CE: cholesterol esters, DG: diglycerides, and TG: triglycerides.