title: External quality control for hormone determinations in the Federal Republic of Germany.
mesh_terms: D005860:Germany, West; D012739:Gonadal Steroid Hormones / Q000032:analysis; D006728:Hormones / Q000032:analysis*; D006801:Humans; D011786:Quality Control; D013256:Steroids / Q000032:analysis; D013972:Thyrotropin / Q000032:analysis; D013974:Thyroxine / Q000032:analysis; D014284:Triiodothyronine / Q000032:analysis
chemical_list: D012739:Gonadal Steroid Hormones; D006728:Hormones; D013256:Steroids; D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine