Don't worry, be happy. Happiness is on cards for the accident victims. They wont be deprived of their lost body parts. Or, any body organ essentially required :
An international team, led by the Wistar Institute in Philadelphia, has found that the p21 gene could block the healing power still enjoyed by some creatures like amphibians, but lost through evolution to all other animals. By turning off p21, the process can be miraculously switched back on. In their research, the scientists found that mice lacking the p21 gene gain the ability to regenerate lost or damaged tissue. Unlike typical mammals, which heal wounds by forming a scar, these animals begin by forming a blastema, a structure associated with rapid cell growth.
