Amsterdam Gastroenterology Endocrinology Metabolism
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                                            Blood collection tubes with protease inhibitors to prevent falsely high renin concentrations due to cryoactivationOzcan, O., Hillebrand, J. J., Beertsen, C., den Elzen, W. P. J. & Heijboer, A. C., 1 Sept 2025, In: Clinica chimica acta. 577, 120486.Research output: Contribution to journal › Article* › Academic › peer-review 
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                                            Neoplastic hypercortisolism: Cut-off values for late-night salivary cortisol & cortisoneKoops, K., Bisschop, P. H., Heijboer, A. C. & Hillebrand, J. J., 15 Jun 2025, In: Clinica chimica acta. 574, 120310.Research output: Contribution to journal › Article* › Academic › peer-review 
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                                            Leeftijdsspecifieke referentie-intervallen voor TSH en schildklierhormoon‡Translated title of the contribution :Age-specific reference intervals for thyroid-stimulating hormone and free thyroxine to optimize diagnosis of thyroid disease Research output: Contribution to journal › Article* › Professional 
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