April D. Armstrong, BSc(PT), MSc, MD, FRCSC, Professor and Chief, Shoulder and Elbow Surgery, Associate, CMD PSHMG Surgical Care, Bone and Joint Institute, Penn State, Milton S. Hershey Medical Center, Hershey, PA, USA Anand M. Murthi, MD, Department of Orthopedic Surgery, Chief, Division of Shoulder and Elbow Surgery, Union Memorial Hospital Baltimore, MD, USA