Quantitative determination of circulating and urinary asymmetric dimethylarginine (ADMA) in humans by gas chromatography-tandem mass spectrometry as methyl ester tri(N-pentafluoropropionyl) derivative. - Tsikas,D.; Schubert,B.; Gutzki,FM.; Sandmann,J.; Frolich,JC. (J Chromatogr B Analyt Technol Biomed Life Sci, 2003)