We did note that delayed arrivers were more likely to be Black/African American (42 vs. 25%, Fisher’s exact test p = 0.0309), and were less likely to be given tissue plasminogen activator, a medication that dissolves blood clots given only if stroke patients arrive within 4.5 h (0% vs. 50%, two-tailed t test p <0.0001). This evidence concerns the gene PLAT and Stroke.