english: And there's lots and lots of stem  cell trials going on worldwide, and they use many different types of cells, but one common theme that seems to be coming out is that actually, very often, those cells will die once you've implanted them.
non_english: Спільне в цих дослідах те, що клітини часто відмирають після імплантації. Їх поміщають як у серці, так і в кровоносній системі,