GPT and myalgic encephalomeyelitis/chronic fatigue syndrome: Using the AoU Controlled Tier v8 database, we defined 903 ME/CFS cases and 75,943 controls, and tested 12 blood traits (glucose, triglyceride, CRP, AST, ALT, ALP, HDL-C, GGT, HbA1c, leucocyte count, neutrophil count, urea) and 2 composite blood traits (TyG and TG-to-HDL-C ratio) using a 20-fold cross-validation (CV) SL (“Methods”), with stratified CV following SL best practices (Phillips et al, 2023).