1. Mense S, Gerwin RD. Muscle pain: understanding the mechanisms. New York: Springer; 2010.
2. Mosby’s Dictionary of Medicine, Nursing & Health Professions. St. Louis: Mosby; 2009.
3. Travell J, Simons D. Travell & Simons’ myofascial pain and dysfunction: the trigger point manual. Philadelphia: Lippincott Williams & Wilkins; 1992.
4. Skootsky SA, Jaeger B, Oye RK. Prevalence of myofascial pain in general internal medicine practice. West J Med. 1989;151(2):157–60.
5. Portenoy RK, Kanner RM. Pain management: theory and practice. Philadelphia: F. A. Davis; 1996.