Heleen I. Jansen

Pregnancy disrupts the accuracy of automated fT4 immunoassays

Heleen I. Jansen, Antonius E. van Herwaarden, Henk J. Huijgen et al. · European Thyroid Journal · 2022 · 21 citations · Full text

Age-Specific Reference Intervals for Thyroid-Stimulating Hormones and Free Thyroxine to Optimize Diagnosis of Thyroid Disease

Heleen I. Jansen, Niek F. Dirks, Jacquelien J Hillebrand et al. · Thyroid · 2024 · 20 citations

Description and validation of an equilibrium dialysis ID-LC-MS/MS candidate reference measurement procedure for free thyroxine in human serum

Heleen I. Jansen, R. van der Steen, André Brandt et al. · Clinical Chemistry and Laboratory Medicine (CCLM) · 2023 · 15 citations · Full text

Increased fT4 concentrations in patients using levothyroxine without complete suppression of TSH

Heleen I. Jansen, Marijn M Bult, Peter H. Bisschop et al. · Endocrine Connections · 2023 · 13 citations · Full text

Optimizing the Dutch newborn screening for congenital hypothyroidism by incorporating amino acids and acylcarnitines in a machine learning-based model

Heleen I. Jansen, Marije van Haeringen, Marelle J. Bouva et al. · European Thyroid Journal · 2023 · 13 citations · Full text