1. Material Measurement Laboratory, Biomolecular Measurement Division , National Institute of Standards and Technology , Gaithersburg , MD , USA
2. Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases , Metabolism and Ageing, KU Leuven , Leuven , Belgium
3. Hollings Marine Laboratory , National Institute of Standards and Technology , Charleston , SC , USA
4. Department of Laboratory Medicine and Pathology , University of Washington , Seattle , WA , USA
5. Seagen, Inc. , Bothell , WA , USA
6. Department of Laboratory Medicine , University Hospitals Leuven , Leuven , Belgium
7. Department of Cellular and Molecular Medicine , KU Leuven , Leuven , Belgium
8. Department of General Medical Oncology , University Hospitals Leuven , Leuven , Belgium
9. Statistical Engineering Division, Information Technology Laboratory , National Institute of Standards and Technology , Gaithersburg , MD , USA