1 Departments of Medicine and Physiology, University of Toronto and The Toronto General Hospital Research Institute, Toronto, Ontario, Canada. Electronic address: herbert.gaisano@utoronto.ca.
2 Université catholique de Louvain (UCLouvain), Institute of Experimental and Clinical Research, Pole of Endocrinology, Diabetes and Nutrition, Brussels, Belgium. Electronic address: jean-christophe.jonas@uclouvain.be.
3 Oxford Centre for Endocrinology and Metabolism, Radcliffe Department of Medicine and Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, UK NIHR Oxford Biomedical Research Centre, Churchill Hospital, Oxford, UK. Electronic address: anna.gloyn@drl.ox.ac.uk.