TY - GEN AU - Jeffery,Jinny AU - MacKenzie,Finlay AU - Beckett,Geoff AU - Perry,Les AU - Ayling,Ruth TI - Norethisterone interference in testosterone assays SN - 1758-1001 PY - 2014///0928 KW - Adolescent KW - Artifacts KW - Blood Chemical Analysis KW - methods KW - Contraceptives, Oral, Synthetic KW - pharmacology KW - Female KW - Humans KW - Norethindrone KW - Testosterone KW - blood N1 - Publication Type: Journal Article UR - https://doi.org/10.1177/0004563213512800 ER -