1. Pizzo P. Relieving pain in America: a blueprint for transforming prevention, care, education, and research.2011.
2. Bernard BP, Putz-Anderson V. Musculoskeletal disorders and workplace factors; a critical review of epidemiologic evidence for workrelated musculoskeletal disorders of the neck, upper extremity, and low back. 1997.
3. Kilbom S , Armstrong T, Buckle P, Fine L, Hagberg M, Haring -Sweeney M, et al. Musculoskeletal disorders: work-related risk factors and prevention. Int. J. Occup. Environ. Health. 1996;2(3):239-46.
4. Garg A, Moore J. Epidemiology of low-back pain in industry. Occup Med (Philadelphia, Pa). 1992;7(4):593-608.
5. Christensen J, Bilde L, Gustavsson A. Socioeconomic consequences of painintensive diseases in Denmark. Danish Institute for Health Services Research: Copenhagen. 2011.
6. Gustavsson A, Bjorkman J, Ljungcrantz C, Rhodin A, Rivano-Fischer M, Sjolund KF, et al. Socioeconomic burden of patients with a diagnosis related to chronic pain-Register data of 840,000 S wedish patients. Eur J Pain. 2012;16(2):289-99. [
DOI:10.1016/j.ejpain.2011.07.006]
7. Gaskin DJ, Richard P. The economic costs of pain in the United States. J. Pain Res.. 2012;13(8):715- 24. [
DOI:10.1016/j.jpain.2012.03.009]
8. Busch AJ, Barber KA, Overend TJ, Peloso PMJ, Schachter CL. Exercise for treating fibromyalgia syndrome. Cochrane Database Syst. Rev. 2007(4). [
DOI:10.1002/14651858.CD003786.pub2]
9. van der Heijden RA, Lankhorst NE, van Linschoten R, Bierma-Zeinstra SM, van Middelkoop M. Exercise for treating patellofemoral pain syndrome. Cochrane Database Syst. Rev. 2015(1). [
DOI:10.1002/14651858.CD010387.pub2]
10. Press O. Part a: Executive Summary. Nutr. Rev. 2009;67(2):114-20. [
DOI:10.1111/j.1753-4887.2008.00136.x]
11. Control CfD, Prevention. From the Centers for Disease Control and Prevention. Escherichia colio157: H7 outbreak linded to commercially distribrted dry-cured salami-Washington and California, 1994. J Am Med Assoc. 1995;273:985-6. [
DOI:10.1001/jama.1995.03520370023012]
12. Global Strategy on Diet, Physical Activity and Health 2017. Available from: http://www.who. int/dietphysicalactivity/pa/en/. [Internet]. 2017.
13. Lundberg O. Causal explanations for class inequality in health-an empirical analysis. Soc. Sci. Med. 1991;32(4):385-93. [
DOI:10.1016/0277-9536(91)90339-E]
14. Schrijvers CT, van de Mheen HD, Stronks K, Mackenbach JP. Socioeconomic inequalities in health in the working population: the contribution of working conditions. Int. J. Epidemiol. 1998;27(6):1011-8. [
DOI:10.1093/ije/27.6.1011]
15. Aittomäki A, Lahelma E, Roos E. Work conditions and socioeconomic inequalities in work ability. Scand. J. Work Environ. Health . 2003:159-65. [
DOI:10.5271/sjweh.718]
16. Aittomäki A, Lahelma E, Rahkonen O, LeinoArjas P, Martikainen P. The contribution of musculoskeletal disorders and physical workload to socioeconomic inequalities in health. EJPH. 2007;17(2):145-50. [
DOI:10.1093/eurpub/ckl121]
17. Leclerc A, Gourmelen J, Chastang J-F, Plouvier S, Niedhammer I, Lanoë J-L. Level of education and back pain in France: the role of demographic, lifestyle and physical work factors. INT ARCH OCC ENV HEA . 2009;82(5):643-52. [
DOI:10.1007/s00420-008-0375-4]
18. Ramezani M, Taghizade G, Abdolvahab M, Lajavardi L, Saeidi Brojeni M. Investigating of risk factors related to chronic non-specific low back pain in military men. Journal of Modern Rehabilitation. 2015;9(3):54-63.