1. Clarke TC, Nahin RL, Barnes PM, Stussman BJ. Use of complementary health approaches for musculoskeletal pain disorders among adults: United States, 2012. National Health Statistics Report. 2016;98:1–12.
2. Crow WT, Willis DR. Estimating cost of care for patients with acute low back pain: a retrospective review of patient records. J Am Osteopath Assoc. 2009;109:229–33.
3. Gaskin DJ, Richard P. The Economic Costs of Pain in the United States. In: Institute of Medicine (US) Committee on Advancing Pain Research, Care, and Education. Relieving Pain in America: A Blueprint for Transforming Prevention, Care, Education, and Research. Washington (DC): National Academies Press (US); 2011. Appendix C. Available from: https://www.ncbi.nlm.nih.gov/books/NBK92521/
4. Musial F, Spohn D, Rolke R. Naturopathic reflex therapies for the treatment of chronic back and neck pain – Part 1: Neurobiological Foundations. Forsch Komplementmed. Prev of CLBP: Sys Rev. 2013;20:219–24 2015.
5. Chou R, Ballantyne JC, Fanciullo GJ, Fine PG, Miaskowski C. Research gaps on use of opioids for chronic noncancer pain: findings from a review of the evidence for an American Pain Society and American Academy of Pain Medicine clinical practice guideline. J Pain. 2009;10:147–59.