TY - RPRT TI - High-throughput sample preparation and analysis using 96-well membrane solid-phase extraction and liquid chromatography-tandem mass spectrometry for the determination of steroids in human urine. AU - G Rule AU - J Henion PY - 1999 DO - 10.1016/s1044-0305(99)00107-5 UR - https://pubmed.ncbi.nlm.nih.gov/10584329/ ID - 10584329 ER -