TY - RPRT TI - Improved sample preparation for the testosterone hydroxylation assay using disposable extraction columns. AU - F Oesch AU - H Wagner AU - K L Platt AU - M Arand PY - 1992 DO - 10.1016/0378-4347(92)80324-j UR - https://pubmed.ncbi.nlm.nih.gov/1491046/ ID - 1491046 ER -