New rules in Britain make it harder for older scientists to use animals.
Mundell
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D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D032761:Animal Experimentation; D017087:Animal Rights / Q000331:legislation & jurisprudence*; D000818:Animals; D000830:Animals, Laboratory; D033161:Government Regulation; D006801:Humans; D008004:Licensure; D017056:Medical Laboratory Personnel / Q000331:legislation & jurisprudence*; D012179:Retirement; D006113:United Kingdom