app_server              Shiny app server
app_ui                  Shiny app UI
bounds                  Bounds
calc_posterior          Function which calculates for k=1, ..., K,
                        Pr(log-HR >= lhr_null | theta.hat.k =
                        lhr_con.k)
calc_predictive         Calculate posterior predictive probability of
                        ruling out lhr_null at final OS analysis
find_pos                Find Positivity Threshold
meeting_probs           Probabilities of meeting positivity threshold
                        under target HR
run_app                 monitOS app
