Reuben D. Johnson is a neurosurgeon in Wellington, New Zealand, where he is the Clinical Lead for Neurosurgery. He trained in Glasgow, London, Cambridge, Oxford, Melbourne, and Vicenza. Johnson completed a doctorate in Genetics of Human Language Evolution in the Department of Human Anatomy and Genetics in Oxford. He also has a dual qualification in law with an LLB from the University of London and is a Fellow of the Australasian College of Legal Medicine. He has an interest in Clinical Governance and has served on the Surgical Education and Training (SET) Board of Neurosurgery for the Neurosurgical Society of Australasia. W. Adriaan Liebenberg is a neurosurgeon and founder of The Health Collective, a multidisciplinary healthcare group integrating pain management, family medicine, and lifestyle science.

With over 20 years of clinical experience, he has been instrumental in advancing patient-centred care and interventional pain medicine in South Africa. As founder and director of The Pain Collective, a chapter of The Health Collective, he has pioneered evidence-based systems and sustainable models of care that improve access, quality, and education across the healthcare continuum.