Physical Therapy as the First Pointof Care to Treat Low Back Pain:An Instrumental Variables Approach toEstimate Impact on Opioid Prescription,Health Care Utilization, and Costs (2) (PDF) Physical Therapy as the First Point of Care to Treat Low Back Pain: An Instrumental Variables Approach to Estimate Impact on Opioid Prescription, Health Care Utilization, and Costs. Available from: https://www.researchgate.net/publication/325319327_Physical_Therapy_as_the_First_Point_of_Care_to_Treat_Low_Back_Pain_An_Instrumental_Variables_Approach_to_Estimate_Impact_on_Opioid_Prescription_Health_Care_Utilization_and_Costs [accessed Nov 03 2019].