de Jong, APJMKok, RMCramers, CAWadman, SKHaan, E2025-03-112025-03-111988https://rivm.openrepository.com/handle/10029/630913A new method for the determination of L-DOPA and 3-O-methyldopa in plasma and cerebrospinal fluid using gas chromatography and electron capture negative ion mass spectrometry.ArticleClin Chim Acta 1988; 171:49-622025-03-11