Is there room for that? To what degree is that admitting to perjury? It seems to me like it is really hard to make room to recant in a justice system. Mostly b

Is there room for that? To what degree is that admitting to perjury? It seems to me like it is really hard to make room to recant in a justice system. Mostly because if allows already convicted people to pressure experts to recant. But also because it lets people get out of intentional perjury (not that these doctors were intentionally wrong). Besides that, I imagine they really don't want the publicity. Or perhaps they feel like they are morally covered by their original testimony being phrased like "according to the state of the art", or "to the best of my current knowledge", so that new insights don't make the statements false.