cindex                  Method to extract the estimated generalized
                        c-index from a 'concreg' object
coef.concreg            Method to extract regression coefficients from
                        a 'concreg' object
concreg                 Concordance regression for survival data
confint.concreg         Method to extract confidence intervals from a
                        'concreg' object.
plotw                   Plot pair weights of concordance regression
                        versus time
vcov.concreg            Method to extract the sandwich covariance
                        matrix for the regression coefficients from a
                        'concreg' object
