CRP and fibromyalgia: The studies encompassed different types of CP: thirteen described generic CP—CP with no specifier [49,50,51,54,55,56,57,58,59,61,64,65,66]; one presented data for both chronic regional pain (CRP)—pain in one site only—and chronic widespread pain (CWP)—pain in multiple sites [52]; one presented data for CRP, CWP, and fibromyalgia [62]; and three presented data for fibromyalgia only [53,60,63].