But ultrahigh doses of chemo are extremely toxic, and in fact, some of the 20,000 women who have received the treatment in the U. S. have died from the toxicity.

但是超大剂量的化疗极端有害，实际上，在美国接受这种治疗的20,000妇女中，已经有一些妇女死于这种化疗的副作用。