TY - RPRT TI - Improved clean-up method for the enkephalins in plasma using immunoaffinity chromatography. AU - T L Hendrickson AU - G S Wilson PY - 1994 DO - 10.1016/0378-4347(93)e0435-s UR - https://pubmed.ncbi.nlm.nih.gov/8205242/ ID - 8205242 ER -