A law in time?
D002460:Cell Line; D033041:Embryo Research / Q000191:economics* / Q000331:legislation & jurisprudence*; D053595:Embryonic Stem Cells; D005380:Financing, Government / Q000331:legislation & jurisprudence; D006801:Humans; D009316:National Institutes of Health (U.S.) / Q000191:economics / Q000331:legislation & jurisprudence*; D014481:United States