1. Sinaki M, Merritt JL, Stilwell GK. Tension myalgia of the pelvic floor. Mayo Clin Proc. 1977;52:717–22.
2. Mathias SD, Kupperman M, Liberman RF, Steege JF. Chronic pelvic pain, prevalence, health-related quality of life and economic correlates. Obstet Gynecol. 1996;87:332–7.
3. Grace V, Zondervan K. Chronic pelvic pain in women in New Zealand: comparative well-being, comorbidity, and impact on work and other activities. Health Care Women Int. 2006;27:585–99.
4. Zondervan KT, Yudkin PL, Vessey MP, et al. The community prevalence of chronic pelvic pain in women and associated illness behavior. Br J Gen Pract. 2001;51:541–7.
5. Harlow BL, Stewart EG. A population-based assessment of chronic unexplained vulvar pain: have we underestimated the prevalence of vulvodynia? J Am Med Womens Assoc. 2003;58:82–8.