title: Legal challenges to animal experimentation.
mesh_terms: D017087:Animal Rights / Q000331:legislation & jurisprudence* / Q000639:trends; D000827:Animal Welfare / Q000331:legislation & jurisprudence*; D000818:Animals; D005858:Germany; D012106:Research / Q000331:legislation & jurisprudence; D013557:Switzerland; D014481:United States