Simon GE, VonKorff M, Piccinelli M, Fullerton C, Ormel J. An international study of the relation between somatic symptoms and depression. N Engl J Med. 1999 Oct 28;341(18):1329-35. doi: 10.1056/NEJM199910283411801. PMID: 10536124.
Carey TS, Freburger JK, Holmes GM, Castel L, Darter J, Agans R, Kalsbeek W, Jackman A. A long way to go: practice patterns and evidence in chronic low back pain care. Spine (Phila Pa 1976). 2009 Apr 1;34(7):718-24. doi: 10.1097/BRS.0b013e31819792b0. PMID: 19282797; PMCID: PMC2664198.
Bair MJ, Wu J, Damush TM, Sutherland JM, Kroenke K. Association of depression and anxiety alone and in combination with chronic musculoskeletal pain in primary care patients. Psychosom Med. 2008 Oct;70(8):890-7. doi: 10.1097/PSY.0b013e318185c510. Epub 2008 Sep 16. PMID: 18799425; PMCID: PMC2902727.