No drug effect (both 0.15 per day): growth-rate comparison p<0.05 4.2%; day-21 survivors p<0.05 4.1% (no test possible in 6.3%); any single day p<0.05 18.5%; median day-21 T/C among survivors 1.00 Drug slows growth (0.15 vs 0.10 per day): growth-rate comparison p<0.05 98.8%; day-21 survivors p<0.05 61.0% (no test possible in 3.2%); any single day p<0.05 93.9%; median day-21 T/C among survivors 0.50 True day-21 T/C without culling for the drug scenario: 0.35