TY - RPRT TI - Semi-automated liquid--liquid back-extraction in a 96-well format to decrease sample preparation time for the determination of dextromethorphan and dextrorphan in human plasma. AU - Renee D Bolden AU - Steven H Hoke AU - Thomas H Eichhold AU - David L McCauley-Myers AU - Kenneth R Wehmeyer PY - 2002 DO - 10.1016/s0378-4347(01)00555-2 UR - https://pubmed.ncbi.nlm.nih.gov/12016010/ ID - 12016010 ER -