alphaEst                Estimate the Interval Baseline Survival Rates
                        for Discrete-Time Multivariate Frailty Model
                        for Grouped Survival Data
betaEst                 Estimate the Fixed Effect Parameter for
                        Discrete-Time Multivariate Frailty Model for
                        Grouped Survival Data
lclGWAS-package         Efficient Estimation of Multivariate Frailty
                        Model Using Exact Likelihood Function for
                        Grouped Survival Data
varEst                  Estimate the Frailty Variance for Discrete-Time
                        Multivariate Frailty Model for Grouped Survival
                        Data
