Deyo Richard A, Ching Alex
Departments of Family Medicine, Medicine, Public Health and Preventive Medicine, and Orthopaedic Surgery, Oregon Health and Science University, Portland, OR, USA Center for Research in Occupational and Environmental Toxicology, Oregon Health and Science University, Portland, OR, USA Kaiser Permanente Center for Health Research, Portland, OR, USA.
Pain. 2012 Nov;153(11):2155-2156. doi: 10.1016/j.pain.2012.07.017. Epub 2012 Jul 28.