Lübbeke, A., Rees, J. L., Barea, C., Combescure, C., Carr, A. J., & Silman, A. J. (2017). International variation in shoulder arthroplasty. Acta Orthopaedica, 88(6), 592–599. https://doi.org/10.1080/17453674.2017.1368884