FitDat                  Fit Historical Survival Data Assuming the
                        Failure Time Follows a Weibull Distribution
LRT                     Conduct the Interim or Final Analysis Using the
                        One-Sample Log-Rank Test for Two-Stage TTE
                        Trials
Sim                     Calculate Empirical Power by Simulation for
                        Two-Stage Designs Using One-Sample Log-Rank
                        Test
phase2.TTE              Two-Stage Designs with TTE Outcomes Using the
                        One-Sample Log-Rank Test
