RT Journal Article SR Electronic T1 Atmospheric Pressure Chemical Ionization Is a Suboptimal Ionization Source for Steroids JF Clinical Chemistry JO Clin. Chem. FD American Association for Clinical Chemistry SP 974 OP 976 DO 10.1373/clinchem.2018.287029 VO 64 IS 6 A1 Sun, Qian A1 Gu, Jianghong A1 Stolze, Brian R. A1 Soldin, Steven J. YR 2018 UL http://clinchem.aaccjnls.org/content/64/6/974.abstract AB