Median PFS was 2.8 months (80% CI 2.0-2.9) for A and 4.2 months (80% CI 2.8-4.7) for AT….Median OS was 8.5 months (80 % CI 7.4-12.7) for A and 9.4 months (80% CI 8.1-14.2) for AT. ORR was 16% (5/32, 80% CI 8-27%) for A and 12% (4/34, 80% CI 5-22%) for AT....This study met its primary endpoint demonstrating that maintenance AT improved PFS in SLFN11-selected patients with ES-SCLC.