Looking at the Kaplan-Meier estimator, aren't the sites just sharing, for each timepoint, the number at risk and the number of events? Perhaps reviewers asked f

Looking at the Kaplan-Meier estimator, aren't the sites just sharing, for each timepoint, the number at risk and the number of events? Perhaps reviewers asked for this, but it seems fairly irrelevant. It would be nice to see just the kernel of their claimed advance.