Executive Summary: There aren’t any.

The first potential alternative is a promising breakthrough in the biotech world of stem cell research with the news that Harvard scientists reported taking skincells to generate embryonic stem cells.

Researcher Kevin Eggan and his colleagues achieved this dramatic medical advance by fusing individual adult skin cells and bone cells to embryonic cells.

However Eggan estimates it may be as much as ten years before this method can be used in treatment. His complete report appeared in the journal Science on-line on August 22.

Read more here.