Use of a 5-item modified Fragility Index for risk stratification in patients undergoing surgical management of proximal humerus fractures oleh Daniel R. Evans, MSc, Eliana B. Saltzman, MD, Albert T. Anastasio, MD, Ndeye F. Guisse, BS, Elshaday S. Belay, MD, Tyler S. Pidgeon, MD, Marc J. Richard, MD, David S. Ruch, MD, Oke A. Anakwenze, MD, MBA, Mark J. Gage, MD, Christopher S. Klifto, MD