Mechlenburg, I. et al. 2020. Patients undergoing shoulder arthroplasty for failed nonoperative treatment of proximal humerus fracture have low implant survival and low patient-reported outcomes: 837 cases from the Danish Shoulder Arthroplasty Registry. Acta Orthopaedica. 91, 3 (Feb. 2020), 319–325. DOI:https://doi.org/10.1080/17453674.2020.1730660.