Affiliation: | (1) Diabetes Centre, Department of Internal Medicine, VU University Medical Centre, de Boelelaan 1117, 1007 MB Amsterdam, the Netherlands;(2) Department of Endocrinology and Metabolism, Academic Medical Centre, Amsterdam, the Netherlands;(3) Department of Physics and Medical Technology, VU University Medical Centre, Amsterdam, the Netherlands;(4) Department of Clinical Chemistry, Laboratory of Endocrinology, Academic Medical Centre, Amsterdam, the Netherlands |