Guest Editor: Nicholas N. DePhillipo (McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA)

Guest Editors: Giuseppe Solarino (Associate Professor in Orthopedics and Traumatology, University of Bari, Italy) and Giuseppe Marongiu (Assistant Professor in Orthopedics and Traumatology, University of Cagliari, Italy)

Guest Editors: Nemandra A Sandiford(Consultant, Joint Reconstruction Unit, Southland Teaching Hospital, Southern District Health Board, Invercargill, New Zealand) and Daniel Kendoff (Department of Orthopaedic Surgery, Helios ENDO-Klinik, Hamburg, Germany)

Guest Editors: Jonathan D. Hughes and Albert Lin (Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, USA.)

Guest Editor: Nicholas N. DePhillipo (University of Pennsylvania, PA, USA.)

Guest Editor: Prashant Meshram (Orthopedic Shoulder & Knee Specialist, Orthocure SportsMed Center, Dubai; Fellow, Johns Hopkins University, USA; Fellow, Seoul National University, South Korea.)