1. Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
2. Division of BioAnalytical Chemistry, Amsterdam Institute of Molecular & Life Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
3. Center for Analytical Sciences Amsterdam, Amsterdam, The Netherlands
4. Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands