Niels C. Jonker

Assen, DR, Netherlands

Last Updated: 09/26/2026

Save publications for later
Sign Up
Not sure about your diagnosis?
Check Your Symptoms
Found 38 publications

Evaluating a custom GPT assistant for critical appraisal of biological variation studies by the BIVAC.

Evaluating a custom GPT assistant for critical appraisal of biological variation studies by the BIVAC.

Journal: Clinical chemistry and laboratory medicine
Published: June 29, 2026

Thyroid hormone profile and biological variation in a population of athletes during an entire sport season.

Thyroid hormone profile and biological variation in a population of athletes during an entire sport season.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: January 29, 2026

Thyroid hormone profile and biological variation in a population of athletes during an entire sport season.

Thyroid hormone profile and biological variation in a population of athletes during an entire sport season.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: January 29, 2026

Novel biomarkers in bone pathophysiology: Establishing reference intervals and biological variations estimates for serum leptin, sclerostin, lipocalin-2, osteoprotegerin, resistin and Dickkopf-related protein-1 from the European biological variation study (EuBIVAS) populations.

Novel biomarkers in bone pathophysiology: Establishing reference intervals and biological variations estimates for serum leptin, sclerostin, lipocalin-2, osteoprotegerin, resistin and Dickkopf-related protein-1 from the European biological variation study (EuBIVAS) populations.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: February 21, 2025

The biological variation of insulin resistance markers: data from the European Biological Variation Study (EuBIVAS).

The biological variation of insulin resistance markers: data from the European Biological Variation Study (EuBIVAS).

Journal: Clinical chemistry and laboratory medicine
Published: June 07, 2024

Corrigendum to "The European biological variation study (EuBIVAS): Biological variation data for testosterone, follicle stimulating hormone, prolactin, luteinizing hormone and dehydroepiandrosterone sulfate in men" [Clin. Chim. Acta 555 (2024) 117806].

Corrigendum to "The European biological variation study (EuBIVAS): Biological variation data for testosterone, follicle stimulating hormone, prolactin, luteinizing hormone and dehydroepiandrosterone sulfate in men" [Clin. Chim. Acta 555 (2024) 117806].

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: May 10, 2024

A standard to report biological variation data studies - based on an expert opinion.

A standard to report biological variation data studies - based on an expert opinion.

Journal: Clinical chemistry and laboratory medicine
Published: April 19, 2024

Systematic review and meta-analysis of biological variation data of urine albumin, albumin to creatinine ratio and other markers in urine.

Systematic review and meta-analysis of biological variation data of urine albumin, albumin to creatinine ratio and other markers in urine.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: April 10, 2024

Analytical performance specifications based on biological variation data - considerations, strengths and limitations.

Analytical performance specifications based on biological variation data - considerations, strengths and limitations.

Journal: Clinical chemistry and laboratory medicine
Published: January 22, 2024

The European biological variation study (EuBIVAS): Biological variation data for testosterone, follicle stimulating hormone, prolactin, luteinizing hormone and dehydroepiandrosterone sulfate in men.

The European biological variation study (EuBIVAS): Biological variation data for testosterone, follicle stimulating hormone, prolactin, luteinizing hormone and dehydroepiandrosterone sulfate in men.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: January 17, 2024

Sex-related differences in within-subject biological variation estimates for 22 essential and non-essential amino acids.

Sex-related differences in within-subject biological variation estimates for 22 essential and non-essential amino acids.

Journal: Clinica chimica acta; international journal of clinical chemistry
Published: November 02, 2023

Biological variation of inflammatory and iron metabolism markers in high-endurance recreational athletes; are these markers useful for athlete monitoring?

Biological variation of inflammatory and iron metabolism markers in high-endurance recreational athletes; are these markers useful for athlete monitoring?

Journal: Clinical chemistry and laboratory medicine
Published: September 25, 2023
Showing 1-12 of 38

Last Updated: 09/26/2026