S0_inverse              Inverse of baseline survival function S_0
S0_weibull              Weibull reference survival function
conduct                 Bayesian Interim and Final Analysis (Unified
                        Transformed Time Framework)
delta_from_theta_goal   Convert target EFS goal to delta parameter
                        under proportional hazards model
find_Nw_pIA             Search for feasible interim analysis thresholds
                        (Unified Framework)
oc_two_stage            Evaluate operating characteristics for
                        two-stage adaptive survival designs (Unified
                        Framework)
run_two_stage_trial     Run Two-Stage Bayesian Single-Arm Survival
                        Trial Simulation
stats_transformed       Compute transformed statistics for survival
                        data
two_stage_optimize_design
                        Optimize two-stage adaptive survival design
