41.   Differences became public just months after the overthrow of former president Slobodan Milosevic in October.

42.   Differences became still more acute in December after the four-day bombing campaign by Britain and the United States.

43.   How did the differences between them become so dramatic?

44.   Off-pump patients had less mental decline than heart-lung patients at three months, but the differences became negligible a year after surgery.