Bush's policy allowed federally funded research on only a small number of cell lines in existence in 2001 that many scientists now see as obsolete or contaminated.
Bush's policy allowed federally funded research on only a small number of cell lines in existence in 2001 that many scientists now see as obsolete or contaminated.
现在很多科学家认为，现存的美国政府2001年制定的联邦基金资助少量细胞系研究的政策有些过时。