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Journal of Chromatography|February 8, 1985

Determination of inorganic sulphate in plasma by reversed-phase chromatography using ultraviolet detection and its application to plasma samples of patients receiving different types of haemodialysisB J Koopman, G Jansen, B G Wolthers, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|May 31, 1989

Hydroxycholesterols in serum from hypercholesterolaemic patients with and without bile acid sequestrant therapyJ J van Doormaal, N Smit, B J Koopman, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|June 30, 1983

Diagnosis of cerebrotendinous xanthomatosis (CTX) and effect of chenodeoxycholic acid therapy by analysis of urine using capillary gas chromatographyB G Wolthers, M Volmer, J van der Molen, et al.

Gastroenterology|August 1, 1989

Benign recurrent intrahepatic cholestasis: altered bile acid metabolismC M Bijleveld, R J Vonk, F Kuipers, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|September 15, 1984

Capillary gas chromatographic determinations of urinary bile acids and bile alcohols in CTX patients proving the ineffectivity of ursodeoxycholic acid treatmentB J Koopman, B G Wolthers, J C van der Molen, et al.

Biochimica Et Biophysica Acta|October 1, 1986

Increased (23R)-hydroxylase activity in patients suffering from cerebrotendinous xanthomatosis, resulting in (23R)-hydroxylation of bile acidsB J Koopman, B G Wolthers, J C Van der Molen, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|March 13, 1984

Capillary gas chromatographic determination of cholestanol/cholesterol ratio in biological fluids. Its potential usefulness for the follow-up of some liver diseases and its lack of specificity in diagnosing CTX (cerebrotendinous xanthomatosis)B J Koopman, J C van der Molen, B G Wolthers, et al.

Journal of Inherited Metabolic Disease|January 1, 1988

Cerebrotendinous xanthomatosis: a review of biochemical findings of the patient population in The NetherlandsB J Koopman, B G Wolthers, J C van der Molen, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|July 15, 1988

Determination of cholic acid and chenodeoxycholic acid pool sizes and fractional turnover rates by means of stable isotope dilution technique, making use of deuterated cholic acid and chenodeoxycholic acidB J Koopman, F Kuipers, C M Bijleveld, et al.

Journal of Chromatography|June 13, 1986

Improved gas chromatographic-mass fragmentographic assay for tetrahydroaldosterone and aldosterone in urineB J Koopman, I J Lokerse, H Verweij, et al.

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Journal of Chromatography|February 8, 1985

Determination of inorganic sulphate in plasma by reversed-phase chromatography using ultraviolet detection and its application to plasma samples of patients receiving different types of haemodialysisB J Koopman, G Jansen, B G Wolthers, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|May 31, 1989

Hydroxycholesterols in serum from hypercholesterolaemic patients with and without bile acid sequestrant therapyJ J van Doormaal, N Smit, B J Koopman, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|June 30, 1983

Diagnosis of cerebrotendinous xanthomatosis (CTX) and effect of chenodeoxycholic acid therapy by analysis of urine using capillary gas chromatographyB G Wolthers, M Volmer, J van der Molen, et al.

Gastroenterology|August 1, 1989

Benign recurrent intrahepatic cholestasis: altered bile acid metabolismC M Bijleveld, R J Vonk, F Kuipers, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|September 15, 1984

Capillary gas chromatographic determinations of urinary bile acids and bile alcohols in CTX patients proving the ineffectivity of ursodeoxycholic acid treatmentB J Koopman, B G Wolthers, J C van der Molen, et al.

Biochimica Et Biophysica Acta|October 1, 1986

Increased (23R)-hydroxylase activity in patients suffering from cerebrotendinous xanthomatosis, resulting in (23R)-hydroxylation of bile acidsB J Koopman, B G Wolthers, J C Van der Molen, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|March 13, 1984

Capillary gas chromatographic determination of cholestanol/cholesterol ratio in biological fluids. Its potential usefulness for the follow-up of some liver diseases and its lack of specificity in diagnosing CTX (cerebrotendinous xanthomatosis)B J Koopman, J C van der Molen, B G Wolthers, et al.

Journal of Inherited Metabolic Disease|January 1, 1988

Cerebrotendinous xanthomatosis: a review of biochemical findings of the patient population in The NetherlandsB J Koopman, B G Wolthers, J C van der Molen, et al.

Clinica Chimica Acta; International Journal of Clinical Chemistry|July 15, 1988

Determination of cholic acid and chenodeoxycholic acid pool sizes and fractional turnover rates by means of stable isotope dilution technique, making use of deuterated cholic acid and chenodeoxycholic acidB J Koopman, F Kuipers, C M Bijleveld, et al.

Journal of Chromatography|June 13, 1986

Improved gas chromatographic-mass fragmentographic assay for tetrahydroaldosterone and aldosterone in urineB J Koopman, I J Lokerse, H Verweij, et al.

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