DR_Qopt                 The Doubly Robust Estimator of the
                        Quantile-Optimal Treatment Regime
IPWE_MADopt             Estimation of the Optimal Treatment Regime
                        defined as Minimizing Gini's Mean Differences
IPWE_Mopt               Estimate the Mean-optimal Treatment Regime
IPWE_Qopt               Estimate the Quantile-optimal Treatment Regime
TwoStg_Mopt             Estimate the Two-stage Mean-Optimal Treatment
                        Regime
TwoStg_Qopt             Estimate the Two-stage Quantile-optimal
                        Treatment Regime
abso_diff_est           Estimate the Gini's mean difference/mean
                        absolute difference(MAD) for a Given Treatment
                        Regime
augX                    Generate Pseudo-Responses Based on Conditional
                        Quantile Regression Models
dr_quant_est            The Doubly Robust Quantile Estimator for a
                        Given Treatment Regime
get_os                  Get the OS from R
mean_est                The Inverse Probability Weighted Estimator of
                        the Marginal Mean Given a Specific Treatment
                        Regime
mestimate               The Mean-Optimal Treatment Regime Wrapper
                        Function
qestimate               The Quantile-Optimal Treatment Regime Wrapper
                        Function
quant_est               Estimate the Marginal Quantile Given a Specific
                        Treatment Regime
