importFrom("stats", "dgamma", "dlnorm", "dnorm", "integrate", "pgamma",
           "plnorm", "pnorm", "punif", "qnorm", "runif", "rweibull",
           "uniroot")
import("survival")
export(get_oc)
export(optimal)
export(sample_size)
export(sample_size_3arm)
export(get_oc_3arm)
export(sampsize_1stage_2arm)
