Experimental            Nivolumab KM data used for reconstructing PFS
                        KM curve
SOC                     Docetaxel KM data used for reconstructing PFS
                        KM curve
TTOT_fun                Compute the Total Time-on-Test (TTOT) Statistic
Two_stage_sample_size   Calculate Sample Sizes for a Two-Stage Trial
                        Design.
conduct                 Computes the hazard ratio between post- and
                        pre-separation periods, provides the 95%
                        Bayesian credible interval, and makes a
                        Go/No-Go decision based on the trial data. This
                        function is intended for interim and final
                        analyses in two-arm survival trials with
                        delayed treatment effects.
event_fun               Return expected event number at interim
                        analysis and final analysis.
generate_pe             Generate event times from a piecewise
                        exponential distribution.
get.optimal_2arm_piecewise
                        Obtain Optimal Design Parameters for DTE-BOP2
                        Design
getoc_2arm_piecewise    Compute Operating Characteristics for Two-Arm
                        Piecewise Exponential Designs
rtrunc_gamma            Generate Random Variables from a Truncated
                        Gamma Distribution.
trunc_gamma_para        Estimate Shape and Scale Parameters for
                        Truncated Gamma Distribution
