P41. Intraoperative neurophysiologic monitoring and neurologic outcomes in orthopedic spine surgery patients without preoperative neurologic deficits. - Hurley, Richard; Fees, Gretchen; Haffner, Max R.; Valentine, Erika; Steele, Amy; Nowacki, Douglas; Javidan, Yashar; Roberto, Rolando F.; Klineberg, Eric O. (Spine Journal, 2019)