Alberto Gobbi completed his residency in orthopedic surgery at the Medical Faculty of Milan University in 1988, and in Sports Medicine in Genoa, in 1992. He was one of the first Europeans to join the International Cartilage Repair Society and he worked for several years with the leading international experts in orthopedic surgery, arthroscopy and regenerative medicine. He founded OASI Bioresearch Foundation Gobbi Onlus (NPO), which is recognized as an international teaching center by ISAKOS and ICRS, and has dedicated his time to the education of hundreds of fellows over the last 20 years. John G. Lane is a Clinical Associate Professor-voluntary at the Department of Orthopedic Surgery, at the University of California, San Diego Dr. Lane completed his residency at the University of Michigan and fellowship training in sports medicine at UCSD. He is a member of AAOS, AANA, AOSSM, ISAKOS and ICRS. Currently he is the chair of the ICRS membership committee and a member of the ISAKOS education committee. His clinical field of practice focuses on complex knee and shoulder injuries and he is pursuing ongoing research into rotator cuff injury and the effect of diabetes. He is also conducting research on the effects of valgus unloader knee bracing on cartilage and bone healing.Umile Giuseppe Longo is an Associate Professor and Consultant in Trauma and Orthopedic Surgery at the University Campus Bio-Medico of Rome. He is member of the editorial board of high-impact journals in the field of sports medicine and orthopedics, and editor of the Orthopedics and Biomechanics section of BMC Musculoskeletal Disorders. He is author of more than 300 peer-reviewed papers and co-author of more than 80 chapters published in international books. He has been the recipient of several prestigious national and international awards. His research interests include shoulder traumatology and replacement.