Preoperative factors predict prolonged length of stay, serious adverse complications, and readmission following operative intervention of proximal humerus fractures: a machine lear... oleh Alexander L. Hornung, MD, Samuel S. Rudisill, MD, Johnathon R. McCormick, MD, John T. Streepy, MSc, William E. Harkin, MD, Noah Bryson, MSc, Xavier Simcock, MD, Grant E. Garrigues, MD