Jean-Noël Argenson Jean-Noël Argenson is Chairman of the Department of Orthopaedic and Traumatologic Surgery, as well as Professor of Orthopaedic Surgery, Department of Orthopaedic Surgery (Hip and Knee Replacement) at the Aix Marseille University, Hospital Sainte-Marquerite, Marseille, France. He is also Medical Director of the Institute for Locomotion and chief of Bone and Joint Diseases of Marseille University-Hospital Centres. Besides EFORT, Prof. Argenson is actively involved in many professional societies and associations, and is a past-president of the European Knee Society and International Society for Technology in Arthroplasty (I.S.T.A.). Prof. Argenson has special interests in biomechanics and range of motion, and MIS and computer assisted navigation in knee and hip arthroplasty, and has published close to 160 pubmed indexed papers on his research to date. David F Dalury David F. Dalury is Professor of Orthopaedic Surgery at the University of Maryland and Chief of Orthopedics at the University of Maryland St Joseph Hospital. After graduating from Dartmouth Medical School, he underwent training at the Harvard University hospitals and did a Fellowship in Adult Reconstruction at the Brigham and Woman’s Hospital. He is member of the Knee Society and the European Knee Society (as is JNA).  He is especially interested in Adult Reconstruction and, published and presented extensively on the subject.