Awkward inconsistencies of a stem-cell rule.
D033041:Embryo Research; D004622:Embryo, Mammalian / Q000166:cytology; D033161:Government Regulation; D006801:Humans; D009316:National Institutes of Health (U.S.); D011057:Politics; D012106:Research / Q000331:legislation & jurisprudence*; D012109:Research Support as Topic / Q000331:legislation & jurisprudence; D013234:Stem Cells; D014481:United States