title: "Improved" sample extraction before liquid chromatography of prednisone and prednisolone in serum.
mesh_terms: D002853:Chromatography, Liquid; D006801:Humans; D011239:Prednisolone / Q000302:isolation & purification*; D011241:Prednisone / Q000302:isolation & purification*
chemical_list: D011239:Prednisolone; D011241:Prednisone