Table 1: Patents with chemotherapy Years Number at Risk Death survived Survival probability 1 197 1 2 3 3 6 4 1 5 3 6 0 7 3 8 1 9 0 10 0 11 1 Table 2: Patents without chemotherapy Years Number at Risk Death Censored survived Survival probability 1 103 0 5 2 8 7 3 7 6 4 2 5 4 17 3 5 0 6 0 7 1 7 0 5 0 8 5 6 7 8 9 10 11 Censored 15 21 23 21 29 11 5 16 9 11 17