21.   Erbitux had been widely hailed as a major advance in the fight against cancer because it targets diseased cells while leaving healthy ones alone.

22.   Eventually, the marrow can be replaced by fibrous tissue the diseased cells form.

23.   Erbitux has been widely hailed as a major advance in the fight against cancer because it targets diseased cells while leaving healthy ones alone.

24.   Last year, Alfred Gilman and Martin Rodbell of the United States won for explaining the inner-working of diseased cells.

25.   Mountford said the planned research would use cells donated by people suffering genetic diseases to create cloned embryos with diseased cell lines.

26.   Other organs, such as the liver, spleen or lymph nodes, may stop functioning properly if infiltrated by the diseased cells.

27.   Pedestrians were buttonholed at major intersections and encouraged to study diseased cells through a microscope, while health workers pointed out the growths on the pickled lungs.

28.   The healthy gene must be introduced into the nuclei of the diseased cells by using a vector, or transfer system.