Predicting Non-Routine Discharge After Elective Spine Surgery: External Validation of Machine Learning Algorithms Using Institutional Data. Issue 5 (1st May 2019) - Stopa, Brittany M; Robertson, Faith C; Karhade, Aditya; Chua, Melissa; Broekman, Marike L D; Schwab, Joseph H; Smith, Timothy R; Gormley, William B