AP - San Diego researchers recently confirmed scientifically what biologists knew intuitively: The stem cell lines President Bush approved for federally funded research are contaminated by the mouse "feeder cells" used to make them grow in the lab.{br}{br}View the Entire Article (http://us.rd.yahoo.com/dailynews/rss/science/*http://story.news.yahoo.com/news?tmpl=story2&u=/ap/20050218/ap_on_sc/mouse_free_stem_cells){br}