United States National Pain Strategy for Population Research: Concepts, Definitions, and Pilot Data.
Von Korff M, Scher AI, Helmick C, Carter-Pokras O, Dodick DW, Goulet J, Hamill-Ruth R, LeResche L, Porter L, Tait R, Terman G, Veasley C, Mackey S. United States National Pain Strategy for Population Research: Concepts, Definitions, and Pilot Data. J Pain. 2016 10; 17(10):1068-1080.