(PDF), High Value Care, Consumer Reports, retrieved 23 December 2013 American College of Physicians (September 2013), "Five Things Physicians and Patients Should Question", Choosing Wisely: an initiative of the ABIM Foundation, American College of Physicians, retrieved 10 December 2013 National Collaborating Centre for Primary Care (May 2009), Low back pain: early management of persistent non-specific low back pain, National Institute for Health and Clinical Excellence, retrieved 9 September 2012 National Collaborating Centre for Primary Care (January 13, 2011), "ACR Appropriateness Criteria low back pain", Agency for Healthcare Research and Quality, American College of Radiology, retrieved 9 September 2012 Chou R, Qaseem A, Snow V, Casey D, Cross JT, Shekelle P, Owens DK (October 2007). "Diagnosis and treatment of low back pain: a joint clinical practice guideline from the American College of Physicians and the American Pain Society".