Malcolm D. C. Donaldson, MD, FRCP, FRCPCH, DCH, Honorary Senior Research Fellow, Glasgow University School of Medicine, Honorary Consultant Paediatrician, Royal Hospital for Children, Glasgow, UK.

John W. Gregory, MBChB, MD, FRCP, DCH, FRCPCH, Professor in Paediatric Endocrinology & Honorary Consultant, Division of Population Medicine, School of Medicine, Cardiff University, Heath Park, Cardiff, UK.

Guy Van Vliet, MD, Staff Endocrinologist, CHU Sainte-Justine and Professor of Pediatrics, University of Montreal, Montreal, QC, Canada.

Joseph I. Wolfsdorf, MB, BCh, MA, DCH, FCP, FAAP, Attending Physician in Endocrinology, Boston Children's Hospital Chair in Endocrinology, Professor of Pediatrics, Harvard Medical School, Boston, Massachusetts, U.S.A.