Mustafa Karahan, MD, was appointed Professor in the Department of Orthopaedics and Traumatology, Acıbadem University School of Medicine, Istanbul, Turkey in 2012. His other appointments include Consultant, Sports Sciences and Sports Health Research and Application Center, Marmara University, Istanbul; Director, Motor Skills Development Laboratory, Marmara University; and Visiting Professor, Boğaziçi University Biomedical Institute. He is a member of the ESSKA Education Committee and the ISAKOS Education and Scholarship Committee. Dr. Karahan is an editorial board member of the American Journal of Sports Medicine and Knee Surgery, Sports Traumatology, Arthroscopy. He has published more than 100 journal publications and presented over 200 national and international presentations and lectures. Pietro S. Randelli, MD, is Research Professor in the Department of Orthopaedics, University of Milan (Università degli Studi) and Chief of the 2nd Department of Orthopaedics, Dipartimento di Scienze Biomediche per la Salute, IRCCS Policlinico San Donato, Milan, Italy. Dr. Randelli is an Executive Board Member and Chairman of the Education and Fellowship Committee of ESSKA (2012-2014) and Second Vice-President of the Italian Society of Knee Surgery, Arthroscopy, and Sports Traumatology, of which he was a founding member. He is also a Past-President of the Magellan Society and in 2005 became an Honorary Member of the American Orthopaedic Society for Sports Medicine. He has surgical experience of more than 4000 procedures and is the author of almost 250 publications.