PCORI: Comparison of Surgical and Nonsurgical Options for Management of Chronic Nonspecific Low Back Pain, Cycle 1 2017 - LOI Sponsor Deadline: Feb 14, 2017Letter of Intent Deadline: Feb 14, 2017 Sponsor: Patient-Centered Outcomes Research InstituteUI Contact: mary-blackwood@uiowa.edu Updated Date: Jan 23, 2017 Email this