Recent work using biobank samples of venous blood drawn from suspected stroke patients in the emergency department within a mean of 2.6 hours from symptom onset indicated that combining blood concentrations of d-dimer and glial fibrillary acidic protein (GFAP) with clinical symptom scale scores (eg, Face Arm Speech Test (FAST), Field Assessment Stroke Triage for Emergency Destination (FAST-ED)) gave high area under the receiver operator curve (AUC) values for prediction of LVO stroke.14 The gene discussed is GFAP; the disease is stroke disorder.