Professor Rachelle Buchbinder AO is a physician specialising in rheumatology and a clinical epidemiologist. She is known internationally as a vocal proponent of evidence-based medicine and her landmark studies that have evaluated treatments that have been accepted into practice prior to their proper evaluation. She was awarded an Officer of the Order of Australia (AO) for services to epidemiology and rheumatology in 2020. Professor Ian Harris AM is an orthopaedic surgeon and Professor of Orthopaedic Surgery. He is known internationally for his research and his support of evidence-based practice. He is the author of Surgery, the Ultimate Placebo, has higher degrees in evidence-based medicine and surgical outcomes, and was awarded a Member of the Order of Australia (AM) for service to orthopaedic surgery.