NestedCohort-package    Survival Analysis of Cohort Studies With
                        Missing Covariate Information ~~ NestedCohort
                        ~~
nested.coxph            Estimate Cox model hazard ratios for covariates
                        with missing data
nested.km               Estimate non-parametric survival curves for
                        each level of categorical variables with
                        missing data.
nested.stdsurv          Estimate Standardized Survivals and
                        Attributable Risks for covariates with missing
                        data
zinc                    Example Study Nested within a Cohort: Zinc and
                        Esophageal Cancer
