fit_splitpop_gamma      Fit a split-population gamma survival model
fit_splitpop_ggamma     Fit a split-population generalized gamma
                        survival model
fit_splitpop_loglogistic
                        Fit a split-population log-logistic survival
                        model
fit_splitpop_lognormal
                        Fit a split-population log-normal survival
                        model
fit_splitpop_weibull    Fit a split-population Weibull survival model
loglik_splitpop_gamma   Log-likelihood: split-population gamma model
loglik_splitpop_ggamma
                        Log-likelihood: split-population generalized
                        gamma model
loglik_splitpop_loglogistic
                        Log-likelihood: split-population log-logistic
                        model
loglik_splitpop_lognormal
                        Log-likelihood: split-population log-normal
                        model
loglik_splitpop_weibull
                        Log-likelihood: split-population Weibull model
