A question of ethics stood between renowned cancer researcher Elliott Osserman and his last remaining hope. For nine years, Parkinson's disease had been stealing his abilities -- to write, to walk and then to talk. Still, his mind continued exploring an important advance in cancer therapy, and with help from colleagues, he continued treating patients. Osserman's last hope was an experimental therapy in which the cells malfunctioning in his brain would be replaced by an injection of vigorous developing cells -- cells from a fetus that a woman had chosen to abort.
But by the time Osserman was accepted for the...