In an international, multicenter survey of 931 patients treated in tertiary care centers, it was reported that 7 out of 10 women being managed for endometriosis have unresolved pain1*
1. De Graaff AA, D’Hooghe TM, Dunselman GAJ, Dirksen CD, Hummelshoj L, WERF EndoCost Consortium, Simoens S. The significant effect of endometriosis on physical, mental and social wellbeing: results from an international cross-sectional survey. Hum Reprod. 2013;28(10):2677-2685.