MOESM5 of Proenkephalin a 119–159 (penKid) – a novel biomarker for acute kidney injury in sepsis: an observational study RosenqvistMari BrontonKevin HartmannOliver BergmannAndreas StruckJoachim MelanderOlle 2019 Additional file 5: Figure S4. ROC Curve showing discriminatory characteristics of serum creatinine, penKid, eGFR for AKI within 28-day all-cause mortality.