Jody M.W. van den Ouweland, PhD is a Clinical Chemist at the Department of Clinical Chemistry at Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands. He studied Chemistry at Leiden University and received his PhD degree in 1994 on the discovery of a type 2 diabetic subtype (MIDD). His main interest is in the field of diabetes and endocrinology. In the area of analytical chemistry his focus is on mass spectrometric and chromatographic methods for quantitative measurement of low molecular weight biomarkers, such as vitamin D. He has published over 50 papers in the field of Clinical Chemistry.