calculate_statistics    Estimate the marginal causal survival curves
                        using potential outcome framework
calculate_trt_effect    Calculate the marginal treatment effect using
                        counterfactual simulations
clmqControl             Control of marginal HR estimation via clustermq
get_marginal_effect     Calculate the marginal treatment effects for
                        hazard ratio (HR) adjusting covariates in
                        clinical trials
get_point_estimate      Calculate the marginal treatment effects (only
                        the point estimate) for hazard ratio (HR)
                        adjusting covariates in clinical trials
get_rmst_estimate       Calculate the marginal restricted mean survival
                        time (RMST) when adjusting covariates in
                        clinical trials
get_variance_estimation
                        Calculate the variance (SE) of the marginal
                        treatment effects (hazard ratio) adjusting
                        covariates in clinical trials
oak                     Oak trial data
rmst_delta              Calculate the variance of the marginal
                        restricted mean survival time (RMST) when
                        adjusting covariates using the delta method
rmst_point_estimate     Calculate the point estimate of the marginal
                        restricted mean survival time (RMST) when
                        adjusting covariates in clinical trials
rmst_unadjust           Calculate the unadjusted restricted mean
                        survival time (RMST)
simulate_counterfactuals
                        Calculate the potential outcomes using marginal
                        survival causual curves
