Preoperative Long-Acting Opioid Use Is Associated with Increased Length of Stay and Readmission Rates After Elective Surgeries. - Doan, Lisa V; Wang, Jing; Padjen, Kristoffer; Gover, Adam; Rashid, Jawad; Osmani, Bijan; Avraham, Shirley; Kendale, Samir (Pain Medicine, 2019)