NBDesign-package        Design and Monitoring of Clinical Trials with
                        Negative Binomial Endpoint
negint2                 A utility functon to calculate the mean
                        exposure under different scenarios
ynegbinompower          Two-sample sample size calculation for negative
                        binomial distribution with variable follow-up
ynegbinompowersim       Two-sample sample size calculation for negative
                        binomial distribution with variable follow-up
ynegbinomsize           Two-sample sample size calculation for negative
                        binomial distribution with variable follow-up
