Samuel Antuña, MD, PhD, FEBOT, Chief of the Shoulder and Elbow Unit, Department of Orthopaedic Surgery & Traumatology, Hospital Universitario La Paz, Madrid, and Raúl Barco, MD, FEBOT, Consulting Surgeon in Shoulder and Elbow, Shoulder and Elbow Unit, Department of Orthopaedic Surgery & Traumatology, Hospital Universitario La Paz, Hospital Madrid Norte Sanchinarro, Madrid.