TY - RPRT TI - Automated sample preparation for drugs in plasma using a solid-phase extraction workstation. AU - T D Parker AU - N Surendran AU - B H Stewart AU - D T Rossi PY - 1998 DO - 10.1016/s0731-7085(97)00278-1 UR - https://pubmed.ncbi.nlm.nih.gov/9682170/ ID - 9682170 ER -