Columbia subject headings:
Harvard subject headings:
Federal aid to medical research--United States.
Human embryo--Research--Moral and ethical aspects--United States.
Human embryo--Research--United States.
Stem cells--Research--Moral and ethical aspects--United States.
Stem cells--Research--United States.
Princeton subject headings:
Federal aid to medical research--United States.
Human embryo--Research--Moral and ethical aspects--United States.
Stem cells--Research--Moral and ethical aspects--United States.