<p>SAN FRANCISCO, California (AP) -- The chairman of President Bush's bioethics council demanded a public apology from Stanford University, accusing the school of trying to conceal the nature of its stem cell research and mischaracterizing the bioethics council's views.</p>
<p>Stanford has said its new cancer institute will conduct stem cell research using nuclear transfer techniques -- work that many consider to be cloning of human cells. However, Stanford said the characterization of its work as cloning is wrong because the institute won't create human embryos, just cells.</p>