dataA                   Hypothetical Study A data
dataB                   Hypothetical Study B data
delta.estimate          Calculates the treatment effect, the difference
                        in survival at time t
design.study            Power and sample size calculation for designing
                        a future study
early.delta.test        Estimate and test the early treatment effect
recover.B               Recover an estimate of the treatment effect at
                        time t in Study B
