title: Surrogate outcomes for clinical trials: use with caution.
authors: E Y
authors: EY
authors: Chew
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D003930:Diabetic Retinopathy / Q000175:diagnosis* / Q000453:epidemiology; D018450:Disease Progression; D006801:Humans; D008269:Macular Edema / Q000175:diagnosis* / Q000453:epidemiology; D012720:Severity of Illness Index; D014922:Wisconsin / Q000453:epidemiology