Determination of free and total catecholamines and salsolinol in urine by ion-pair reversed-phase liquid chromatography with electrochemical detection after a one-step sample clean-upODINK, J; SANDMAN, H; SCHREURS, W. H. P et al.Journal of chromatography. 1986, Vol 377, pp 145-154, issn 0021-9673Article

Management of common bile duct stones: Short- and long-term results with selective endoscopic retrograde cholangiography and endoscopic sphincterotomySCHREURS, W. H; JUTTMANN, J. R; STUIFBERGEN, W. N. H. M et al.Surgical endoscopy. 2002, Vol 16, Num 7, pp 1068-1072, issn 0930-2794, 5 p.Article

Better retrieval of lymph nodes in colorectal resection specimens by pathologists' assistantsKUIJPERS, C. C.H J; VAN SLOOTEN, H. J; SCHREURS, W. H et al.Journal of clinical pathology. 2013, Vol 66, Num 1, pp 18-23, issn 0021-9746, 6 p.Article

Fluorimetric determination of menadione sodium bisulphite (vitamin K₃) in animal feed and premixes by high-performance liquid chromatography with post-column derivatization = Dosage fluorimétrique, par chromatographie liquide haute performance avec post colonne de formation de dérivés, du bisulfite de sodium de ménadione (vitamine K₃) dans les aliments et les mélanges pour animauxSPEEK, A. J; SCHRIJVER, J; SCHREURS, W. H. P et al.Journal of chromatography. 1984, Vol 301, Num 2, pp 441-447, issn 0021-9673Article

Vitamin E composition of some seed oils as determined by high-performance liquid chromatography with fluorometric detection = Détermination, par chromatographie liquide haute performance à détection fluorimétrique, des teneurs en vitamine E de quelques huiles végétalesSPEEK, A. J; SCHRIJVER, J; SCHREURS, W. H. P et al.Journal of food science. 1985, Vol 50, Num 1, pp 121-124, issn 0022-1147Article

Determination of macronutrient and micronutrient levels in Thai Foods : an evaluation of the thai food composition tableSPEEK, A. J; SPEEK-SAICHUA, S; SCHREURS, W. H. P et al.Food chemistry. 1991, Vol 40, Num 3, pp 251-262, issn 0308-8146Article

Fluorometric determination of total vitamin C in whole blood by high-performance liquid chromatography with pre-column derivatizationSPEEK, A. J; SCHRIJVER, J; SCHREURS, W. H. P et al.Journal of chromatography. 1984, Vol 305, Num 1, pp 53-60, issn 0021-9673Article

In vitro measurement of β-carotene cleavage activity : methodological considerations and the effect of other carotenoids on β-carotene cleavageVAN VLIET, T; VAN SCHAIK, F; SCHREURS, W. H. P et al.International journal for vitamin and nutrition research. 1996, Vol 66, Num 1, pp 77-85, issn 0300-9831Article

Deficiencies of vitamins in CAPD patients: the effect of supplementationBOESCHOTEN, E. W; SCHRIJVER, J; KREDIET, R. T et al.Nephrology, dialysis, transplantation (Print). 1988, Vol 3, Num 2, pp 187-193, issn 0931-0509Article

Microdetermination of vitamin A in human plasma using high-performance liquid chromatography with fluorescence detectionSPEEL, A. J; WONGKHAM, C; LIMRATANA, N et al.Journal of chromatography. 1986, Vol 382, pp 284-289, issn 0021-9673Article

The influence of radiotherapy and chemotherapy on the vitamin status of cancer patientsSCHREURS, W. H. P; ODINK, J; EGGER, R. J et al.International journal for vitamin and nutrition research. 1985, Vol 55, Num 4, pp 425-432, issn 0300-9831Article

Biochemical evaluation of the vitamin and iron status of an apparently healthy dutch free-living elderly population. Comparison with younger adultsSCHRIJVER, J; VAN VEELEN, B. W. C; SCHREURS, W. H. P et al.International journal for vitamin and nutrition research. 1985, Vol 55, Num 3, pp 337-349, issn 0300-9831Article

Intestinal β-carotene absorption and cleavage in men : response of β-carotene and retinyl esters in the triglyceride-rich lipoprotein fraction after a single oral dose of β-caroteneVAN VLIET, T; SCHREURS, W. H. P; VAN DEN BERG, H et al.The American journal of clinical nutrition. 1995, Vol 62, Num 1, pp 110-116, issn 0002-9165Article

Mild vitamin a deficiency and risk of respiratory tract diseases and diarrhea in preschool and school children in northeastern ThailandBLOEM, M. W; WEDEL, M; EGGER, R. J et al.American journal of epidemiology. 1990, Vol 131, Num 2, pp 332-339, issn 0002-9262, 8 p.Article

The effect of vitamin A supplementation on tear fluid retinol levels of marginally nourished preschool childrenVAN AGTMAAL, E. J; BLOEM, M. W; SPEEK, A. J et al.Current eye research (Print). 1988, Vol 7, Num 1, pp 43-48, issn 0271-3683Article

Recovery of protein from tear fluid stored in cellulose spongesVAN AGTMAAL, E. J; VAN HAERINGEN, N. J; BLOEM, M. W et al.Current eye research (Print). 1987, Vol 6, Num 4, pp 585-588, issn 0271-3683Article

Effectiveness of weekly vitamin A (10000 IU) and iron (60 mg) supplementation for adolescent boys and girls through schools in rural and urban East Java, IndonesiaSOEKARJO, D. D; DE PEE, S; KUSIN, J. A et al.European journal of clinical nutrition. 2004, Vol 58, Num 6, pp 927-937, issn 0954-3007, 11 p.Article

Socio-economic status and puberty are the main factors determining anaemia in adolescent girls and boys in East Java, IndonesiaSOEKARJO, D. D; DE PEE, S; BLOEM, M. W et al.European journal of clinical nutrition. 2001, Vol 55, Num 11, pp 932-939, issn 0954-3007Article

Fluorometric determination of retinol in human tear fluid using high-performance liquid chromatographySPEEK, A. J; VAN AGTMAAL, E. J; SASTRI SAOWAKONTHA et al.Current eye research (Print). 1986, Vol 5, Num 11, pp 841-845, issn 0271-3683Article

Association between intestinal parasitoses and nutritional status in 3-8-year-old children in Northeast ThailandEGGER, R. J; HOFHUIS, E. H; BLOEM, M. W et al.Tropical and geographical medicine. 1990, Vol 42, Num 4, pp 312-323, issn 0041-3232, 12 p.Article

Dietary intake, nutritional status and well-being of cancer patients: a prospective studyBRUNING, P. F; EGGER, R. J; WEDEL, M et al.European journal of cancer & clinical oncology. 1985, Vol 21, Num 12, pp 1449-1459, issn 0277-5379Article