title: A way forward.
authors.affiliation: The Hastings Center, Garrison, New York, USA.
authors.forename: D
authors.initials: D
authors.lastname: Callahan
mesh_terms: D019976:Cloning, Organism; D033041:Embryo Research; D004622:Embryo, Mammalian; D006801:Humans; D008722:Methods; D010312:Parthenogenesis; D013234:Stem Cells