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Clinica Chimica Acta; International Journal of Clinical Chemistry|October 31, 1985
Bile acid therapies applied to patients suffering from cerebrotendinous xanthomatosisB J Koopman, B G Wolthers, J C van der Molen, et al.Journal of Chromatography|April 24, 1987
Determination of some hydroxycholesterols in human serum samplesB J Koopman, J C van der Molen, B G Wolthers, et al.Clinical Chemistry|January 1, 1997
Evaluation of urinary metanephrine and normetanephrine enzyme immunoassay (ELISA) kits by comparison with isotope dilution mass spectrometryB G Wolthers, I P Kema, M Volmer, et al.Journal of Neuroscience Methods|May 1, 1985
A specific and sensitive determination of gamma aminobutyric acid in CSF and brain tissue by gas chromatography-mass spectrometryJ M Schaaf, A W Teelken, F A Muskiet, et al.Clinical Chemistry|January 1, 1987
Screening for cerebrotendinous xanthomatosis by using an enzymatic assay for 7 alpha-hydroxylated steroids in urineB J Koopman, J C Van der Molen, B G Wolthers, et al.Clinica Chimica Acta; International Journal of Clinical Chemistry|June 18, 1981
Determination of N tau-methylhistamine in plasma and urine by isotope dilution mass fragmentographyJ J Keyzer, B G Wolthers, F A Muskiet, et al.Annals of Clinical Biochemistry|June 8, 2001
Investigation of applicability of a mid-infrared spectroscopic method using an attenuated total reflection accessory and a new near-infrared transmission method for determination of faecal fatM Volmer, A W Kingma, P C Borsboom, et al.Agents and Actions|April 1, 1985
Measurement of N tau-methylhistamine concentrations in plasma and urine as a parameter for histamine release during anaphylactoid reactionsJ J Keyzer, H Breukelman, B G Wolthers, et al.Annals of Clinical Biochemistry|December 6, 2001
Evaluation of specific high-performance liquid-chromatographic determinations of urinary metanephrine and normetanephrine by comparison with isotope dilution mass spectrometryJ J Willemsen, H A Ross, B G Wolthers, et al.Agents and Actions|June 1, 1987
Histamine metabolism after adverse reactions due to d-tubocurarine administrationE Oosting, F J Richardson, J J Keyzer, et al.Pageof 12