Core Clinical Pathology & Biochemistry, Royal Perth Hospital, Perth Paul Glendenning MBChB, MAACB, PhD, FRCPA, FFSc FRACP is a Consultant Endocrinologist and Chemical Pathologist at Royal Perth Hospital and a Clinical Associate Professor in the School of Medicine and Pharmacology, University of Western Australia. He is a member of the Endocrine Working Party of the Royal College of Pathologists, Australasia and an examiner in Chemical Pathology for RCPA. Paul’s main research interest is in vitamin D including analytical issues, biological effects and the clinical outcomes on bone and muscle metabolism. He is a member of the Australian and New Zealand Bone and Mineral Society and American Society for Bone and Mineral Research.