1. Department of Shoulder, Elbow and Hand Surgery, University Hospital Son Espases, Palma de Mallorca, Spain
2. Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Brescia, Italy
3. Department of Shoulder and Elbow Surgery, Schulthess Clinic, Zurich, Switzerland
4. Department of Shoulder and Elbow Surgery, Charité–Universitaetsmedizin Berlin, Berlin, Germany