  The construction of the simultaneous confidence bands for the integrated
hazard function is considered. The Nelson--Aalen estimator is used. The
simultaneous confidence bands based on bootstrap methods are presented. Two
methods of construction of such confidence bands are proposed. The weird
bootstrap method is used for resampling. Simulations are made to compare the
actual coverage probability of the bootstrap and the asymptotic simultaneous
confidence bands. It is shown that the equal--tailed bootstrap confidence band
has the coverage probability closest to the nominal one. We also present
application of our confidence bands to the data regarding survival after heart
transplant.
