Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, St. Thomas' Hospital, London, United Kingdom. Ludwig-Maximilians-Universität München, Dr. von Haunersches Kinderspital, Division of Metabolic and Nutritional Medicine, University of Munich Medical Centre, München, Germany. MRC Lifecourse Epidemiology Unit and NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom. Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom.