Wertz, D C Embryo and stem cell research in the United States: history and politics. [electronic resource] - Gene therapy Jun 2002 - 674-8 p. digital Publication Type: Historical Article; Journal Article ISSN: 0969-7128 Standard No.: 10.1038/sj.gt.3301744 doi Subjects--Topical Terms: Embryo, Mammalian--cytologyEthics--historyHistory, 20th CenturyHistory, 21st CenturyHumansPoliticsReligion and MedicineResearch--historyStem CellsUnited States