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Tijdschrift Voor Kindergeneeskunde|August 1, 1993
[Inborn errors of bile acid metabolism]F Stellaard, B G Wolthers
Clinica Chimica Acta; International Journal of Clinical Chemistry|March 26, 1982
The determination of oxalic acid in plasma and urine by means of capillary gas chromatographyB G Wolthers, M Hayer
Journal of Chromatography. A|July 10, 1999
Clinical applications of gas chromatography and gas chromatography-mass spectrometry of steroidsB G Wolthers, G P Kraan
The Journal of Investigative Dermatology|June 1, 1984
Identification of 5-hydroxy-6-indolyl-O-sulfate in urine of patients with malignant melanomaS Pavel, R Boverhof, B G Wolthers
Clinica Chimica Acta; International Journal of Clinical Chemistry|March 5, 1981
Volatile fatty acids in human peripheral and portal blood: quantitative determination vacuum distillation and gas chromatographyJ Dankert, J B Zijlstra, B G Wolthers
Clinica Chimica Acta; International Journal of Clinical Chemistry|February 1, 1977
The determination of total cholesterol in serum by gas-liquid chromatography compared with two other methodsF R Hindriks, B G Wolthers, A Groen
Agents and Actions|April 1, 1989
Correlation between urinary levels of histamine metabolites in 24-hour urine and morning urine samples of man: influence of histamine-rich foodE Oosting, J J Keyzer, B G Wolthers
Clinica Chimica Acta; International Journal of Clinical Chemistry|February 15, 1985
Detection of 3 beta-hydroxysteroid-dehydrogenase deficiency by urinary steroid profiling: solvolysis of urinary samples should be a necessary prerequisiteB G Wolthers, M Volmer, A P van Seters
Clinica Chimica Acta; International Journal of Clinical Chemistry|December 1, 1987
Development of a reference method for determining urinary oxalate by means of isotope dilution-mass spectrometry (ID-MS) and its usefulness in testing existing assays for urinary oxalateW Koolstra, B G Wolthers, M Hayer, et al.
Clinica Chimica Acta; International Journal of Clinical Chemistry|December 1, 1987
An improved high performance liquid chromatographic method for determining urinary oxalate, making use of an ID-MS reference methodW Koolstra, B G Wolthers, M Hayer, et al.
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