Bräutigam, Christa: Neurotransmitter metabolites in CSF : an external quality control scheme / C. Bräutigam, C. Weykamp, G.F. Hoffmann, R.A. Wevers, 01 June 2002. - 12 S. In: Journal of inherited metabolic disease, ISSN 1573-2665. 25(2002), 4, Seite 287-298 DOI: 10.1023/A:1016550324235