Human embryonic stem cells must be clinic leftovers
* Batches already in existence may be reviewed
* NIH says rules reflect broad public support (Adds reaction from Republican opponent, paragraph 9)
WASHINGTON, July 6 (Reuters) – The U.S. government released new rules on Monday governing federally funded research on human embryonic stem cells, loosening some ethical requirements that [...]

(Reuters) – The U.S. National Institutes of Health released final rules on Monday governing federal funding of human embryonic stem cell research.
Following are some facts about stem cells:
* Stem cells are the body’s master cells, the source of all cells and tissue, including brain, blood, heart, bones and muscles.
* Embryonic stem cells come from days-old [...]