In the Original Investigation titled “First-Line Serplulimab in Extensive-Stage Small Cell Lung Cancer: Secondary Analysis of the ASTRUM-005 Phase 3 Randomized Clinical Trial,” published online June 4, 2026, and in the August 2026 issue, eTable 6 was erroneously excluded from Supplement 3. Supplement 3 has been updated to include eTable 6. This article was corrected online.