<p> <b>Hélder M.D. Pereira, MD, PhD</b>, is a Specialist in Orthopaedics and Traumatology at Póvoa de Varzim-Vila do Conde Hospital Centre, Portugal, and he is researcher, PhD candidate, and invited instructor at Minho university, Braga-Guimarães, Portugal. Moreover he is member of the Foot and Ankle Unit at Ripoll y De Prado Sports Clinic, FIFA Medical Centre of Excellence, Murcia-Madrid, Spain, where he is Coordinator of Clinical Research. He is past-Chairman of ESSKA-AFAS (Ankle and Foot Associates Section) and from 2014 to 2016 chaired the Basic Science Research Committee of ESSKA. He is an editorial board member of<i> Knee Surgery, Sports Traumatology, Arthroscopy (KSSTA) </i>and has authored around 100 publications. </p> <p> <b>Stephane Guillo, MD</b>, is the Medical director of SOS PIED CHEVILLE BORDEAUX, France, a clinical and research institute for foot and ankle surgery. He is also the founder of the Ankle Instability Group and has held leadership roles in various associations. His research is focused now mainly on ankle ligament treatment.<br> </p> <b>Mark Glazebrook, B.Sc.(H), M.Sc., Ph.D., MD, FRCS(C)</b> is a full time Professor of Orthopaedic Surgery at Dalhousie University. He completed his medical training in 1994 and completed specialty training in Orthopaedic Surgery in 1999 at Dalhousie. He then went on to complete a fellowship in Orthopedic Foot & Ankle and Sports Medicine at the University of Western Ontario. This was followed with a PhD in Achilles Tendon Disease at Dalhousie University. Dr. Glazebrook devotes 80% of his working time to clinical practice focusing on Orthopedic Foot & Ankle Reconstruction and Sports Medicine. During research time focus is on outcome studies on Evidence Based Medicine, Ankle Arthritis, MTP Arthritis, Bone Graft Substitutes and Achilles tendon rupture care. He is Past President of the Canadian Orthopedic Association (COA).<br> <b>Masato Takao, MD, PhD</b> is Professor and President of Clinical and Research Institute for Foot and Ankle Surgery (CARIFAS), Jujo Hospital, Kisarazu, Chiba, Japan. He has worked at CARIFAS since 2017. His clinical focus is foot and ankle surgery. His PhD-thesis in 1999 was devoted to "Anatomy for ankle arthroscopy", and since then he has been the author of more than 250 peer-reviewed publications, more than 50 book chapters and textbooks in orthopaedic foot and ankle surgery including English and domestic papers. He is a founding member of Ankle Instability Group (AIG) and chaired the 5th AIG meeting at 2018. <p> <b>James Calder TD MD PhD FRCS </b>completed higher surgical training in London before completing a Fellowship in Brisbane, Australia with Dr Terry Saxby. He was appointed consultant at Hampshire Hospitals and then Chelsea & Westminster Hospital, London. He is Professor in the Dept of Bioengineering, Imperial College London specialising in sports injury research. He has gained a reputation for his clinical interest in the management of foot and ankle injuries in the elite athlete. He looks after many of the professional football teams across Europe and national olympic, rugby, and cricket teams as well as the Royal Ballet, Covent Garden and Birmingham Royal Ballet. He is past chairman of ESSKA-AFAS and the Achilles Tendon Study Group, sub-editor of Bone & Joint Journal and previously Associate Editor KSSTA. He co-founded the Fortius Clinic London<br> </p>