Determination of reference intervals for urinary steroid profiling using a newly validated GC-MS/MS method von de Jong, Wilhelmina H.A., Buitenwerf, Edward, Pranger, Alle T., Riphagen, Ineke J., Wolffenbuttel, Bruce H.R., Kerstens, Michiel N., Kema, Ido P.

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Plasma Free Metanephrine Measurement Using Automated Online Solid-Phase Extraction HPLC Tandem Mass Spectrometry von de Jong, Wilhelmina H.A, Graham, Kendon S, van der Molen, Jan C, Links, Thera P, Morris, Michael R, Ross, H. Alec, de Vries, Elisabeth G.E, Kema, Ido P

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Automated mass spectrometric analysis of urinary and plasma serotonin von de Jong, Wilhelmina H. A, Wilkens, Marianne H. L. I, de Vries, Elisabeth G. E, Kema, Ido P

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Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients von Sotomayor, Camilo G, Eisenga, Michele F, Gomes Neto, Antonio W, Ozyilmaz, Akin, Gans, Rijk O B, Jong, Wilhelmina H A de, Zelle, Dorien M, Berger, Stefan P, Gaillard, Carlo A J M, Navis, Gerjan J, Bakker, Stephan J L

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In Matrix Derivatization Combined with LC-MS/MS Results in Ultrasensitive Quantification of Plasma Free Metanephrines and Catecholamines von van Faassen, Martijn, Bischoff, Rainer, Eijkelenkamp, Karin, de Jong, Wilhelmina H. A, van der Ley, Claude P, Kema, Ido P

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Plasma tryptophan, kynurenine and 3-hydroxykynurenine measurement using automated on-line solid-phase extraction HPLC–tandem mass spectrometry von de Jong, Wilhelmina H.A., Smit, Reinier, Bakker, Stephan J.L., de Vries, Elisabeth G.E., Kema, Ido P.

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Serotonin Rising von Anderson, George M, Cook, Jr, Edwin H, Blakely, Randy D

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Development and validation of a LC-MS/MS method for the establishment of reference intervals and biological variation for five plasma steroid hormones von van der Veen, Anna, van Faassen, Martijn, de Jong, Wilhelmina H.A., van Beek, André P., Dijck-Brouwer, D.A. Janneke, Kema, Ido P.

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Age dependency of plasma vitamin B12 status markers in Dutch children and adolescents von Heiner-Fokkema, M. Rebecca, Riphagen, Ineke J., Wiersema, Nicole S., van Zanden, Jelmer J., Kootstra-Ros, Jenny E., Pinxterhuis, Tineke H., Hooimeijer, H. Louise, van Spronsen, Francjan J., Muller Kobold, Anneke C., de Jong, Wilhelmina H. A.

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Should we depend on reference intervals from manufacturer package inserts? Comparing TSH and FT4 reference intervals from four manufacturers with results from modern indirect metho... von Dirks, Niek F., den Elzen, Wendy P.J., Hillebrand, Jacquelien J., Jansen, Heleen I., Boekel, Edwin ten, Brinkman, Jacoline, Buijs, Madelon M., Demir, Ayse Y., Dijkstra, Ineke M., Endenburg, Silvia C., Engbers, Paula, Gootjes, Jeannette, Janssen, Marcel J.W., Kniest-de Jong, Wilhelmina H.A., Kok, Maarten B., Kamphuis, Stephan, Kruit, Adrian, Michielsen, Etienne, Wolthuis, Albert, Boelen, Anita, Heijboer, Annemieke C.

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High sodium diet converts renal proteoglycans into pro-inflammatory mediators in rats von Hijmans, Ryanne S, Shrestha, Pragyi, Sarpong, Kwaku A, Yazdani, Saleh, El Masri, Rana, de Jong, Wilhelmina H A, Navis, Gerjan, Vivès, Romain R, van den Born, Jacob

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Prenatal Environmental Exposure to Persistent Organic Pollutants and Reproductive Hormone Profile and Pubertal Development in Dutch Adolescents von Berghuis, Sietske A., Bos, Arend F., Groen, Henk, de Jong, Wilhelmina H. A., Muller Kobold, Anneke C., Wagenmakers-Huizinga, Lucie, Sauer, Pieter J. J., Bocca, Gianni

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Dietary Influences on Plasma and Urinary Metanephrines: Implications for Diagnosis of Catecholamine-Producing Tumors von de Jong, Wilhelmina H. A., Eisenhofer, Graeme, Post, Wendy J., Muskiet, Frits A. J., de Vries, Elisabeth G. E., Kema, Ido P.

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Plasma levels of free metanephrines and 3-methoxytyramine indicate a higher number of biochemically active HNPGL than 24-h urinary excretion rates of catecholamines and metabolites von van Duinen, N, Corssmit, E P M, de Jong, W H A, Brookman, D, Kema, I P, Romijn, J A

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Association of vitamin B12, methylmalonic acid, and functional parameters von Wolffenbuttel, B H R, Wouters, H J C M, de Jong, W H A, Huls, G, van der Klauw, M M

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Measurement of plasma vitamin K 1 (phylloquinone) and K 2 (menaquinones-4 and -7) using HPLC-tandem mass spectrometry von Riphagen, Ineke J., van der Molen, Jan C., van Faassen, Martijn, Navis, Gerjan, de Borst, Martin H., Muskiet, Frits A.J., de Jong, Wilhelmina H.A., Bakker, Stephan J.L., Kema, Ido P.

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Dermal tissue remodeling and non-osmotic sodium storage in kidney patients von Hijmans, Ryanne S, van Londen, Marco, Sarpong, Kwaku A, Bakker, Stephan J L, Navis, Gerjan J, Storteboom, Twan T R, de Jong, Wilhelmina H A, Pol, Robert A, van den Born, Jacob

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Use of selective serotonin reuptake inhibitors is associated with very low plasma-free serotonin concentrations in humans von Peters, Marloes AM, van Faassen, Martijn, de Jong, Wilhelmina HA, Bouma, Grietje, Meijer, Coby, Walenkamp, Annemiek ME, de Vries, Elisabeth GE, Oosting, Sjoukje F, Ruhé, Henricus G, Kema, Ido P

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Current status and future developments of LC-MS/MS in clinical chemistry for quantification of biogenic amines von de Jong, Wilhelmina H.A., de Vries, Elisabeth G.E., Kema, Ido P.

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Measurement of plasma vitamin K1 (phylloquinone) and K2 (menaquinones-4 and -7) using HPLC-tandem mass spectrometry von Riphagen, Ineke J., van der Molen, Jan C., van Faassen, Martijn, Navis, Gerjan, de Borst, Martin H., Muskiet, Frits A.J., de Jong, Wilhelmina H.A., Bakker, Stephan J.L., Kema, Ido P.

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