title: Challenging times.
mesh_terms: D032761:Animal Experimentation / Q000331:legislation & jurisprudence*; D000827:Animal Welfare / Q000331:legislation & jurisprudence* / Q000592:standards; D000818:Animals; D005062:European Union; D005858:Germany; D006801:Humans; D023421:Models, Animal; D011323:Primates; D012108:Research Personnel