A. P. M. S. Romao, R. Gorayeb, G. S. Romao, O. Polineto, F. J. C. Reis, J. C. R. Silva, A. A. Nogueira, “High levels of anxiety and depression have a negative effect on quality of life of women with chronic pelvic pain”, Int J Clin Pract, Vol. 63, 2009, pp.707-711.
 K. T. Zondervan, P. L. Yudkin, M. P. Vessey, M. G. Dawes, D. H. Barlow, S. H. Kennedy, “Patterns of diagnosis and referral in women consulting for chronic pelvic pain in UK primary care”, Br J Obstet Gynaecol, Vol. 106, 1999, pp. 1156-61.
 P. Latthe, M. Latthe, L. Say, M. Gulmezoglo, K. S. Khan, “WHO systematic review of prevalence of chronic pelvic pain: a neglected reproductive health morbidity”, BMC Public Health, 2006, pp. 6:177.
 G. P. Silva, A. L. Nasci-mento, D. Michelazzo, F. F. Alves Junior, M. G. Rocha, J. C. Silva, et al, “High prevalence of chronic pelvic pain in women in Ribeirao Preto, Brazil and direct association with abdominal surgery”, Clinics, Vol. 66 (8). 2011, pp. 1307-12.
 S. D. Mathias, M. Kuppermann, R. F. Liberman, R. C Lipschut, J. F. Steege, “Chronic pelvic pain: prevalence, health-related quality of life, and economic correlates”, Obstet Gynecol, Vol. 87, 1996, pp.321-7.
 J. D. Parker, M. Leondires, N. Sinaii, A. Premkumar, L. K. Nieman. P. Stratton, “Persistence of dysme-norrhea and nonmenstrual pain after optimal endometriosis surgery may indicate adenomyosis”, Fertil Steril, Vol. 86, 2006, pp. 711-715.
 J. C. Gambone, B. S. Mittman, M. G. Munro, A. R. Scialli, C. A. Winkel, “Consensus statement for the management of chronic pelvic pain and endometriosis: proceedings of an expert-panel consensus process”, Fertil Steril, Vol. 78, 2002, pp. 961-972.
 P. P. Souza, R. Salata, J. C. Rosae-Silva, F. Candido-dos-Reis, A. A, Nogueira, O. B. Poli-Neto, “Qualitative research as the basis for a biopsychosocial approach to women with chronic pelvic pain”, J Psychosom Obstet Gynaecol, Vol. 32(4), 2011, pp. 165-172.
 R. Ruiz-Moral, E. P. Rodriguez, L. A. Perula de Torres, J. de la Torre, “Physician-patient communication: a study on the observed behaviours of specialty physicians and the ways their patients perceive them”, Patient Educ Couns, Vol. 64(1-3), 2006, pp. 242-248.
 R. W. Stones, W. T. Lawrence, S. A. Selfe. “Lasting impressions: influence of the initial hospital consultation for chronic pelvic pain on dimensions of patient satisfaction at follow-up”, J Psychosom Res, Vol. 60(2), 2006, pp. 163-167.
 S. R. Hahn, K. Kroenke, R. L. Spitzer, D. Brody, J. B. Williams, M. Linzer, et al., “The difficult patient: prevalence, psychopathology, and functional impairment”, J Gen Intern Med, Vol. 11(1), 1996, pp. 1-8.
 E. A. Walker, W. J. Katon, D. Keegan, G. Gardner, M. Sullivan, “Predictors of physician frustration in the care of patients with rheumatological complaints”, Gen Hosp Psychiatry, Vol. 19, 1997, pp. 315-323.
 E. H. Lin, W. Katon, M. Von Korff, T. Bush, P. Lipscomb, J. Russo, E. Wagner, “Frustrating patients: physician and patient perspectives among distressed high users of medical services”, J Gen Intern Med, Vol. 6, 1991, pp. 241-246.
 V. M. Grace, “Problems of communication, diagnosis, and treatment experienced by women using the New Zealand health services for chronic pelvic pain: a quantitative analysis”, Health Care Women Int, Vol. 16, 1995, pp. 521-535.
 P. Salmon, “Patients who present physical symptoms in the absence of physical pathology: a challenge to existing models of doctor-patient interaction”, Patient Educ Couns, Vol. 39, 2000, pp. 105-113.
 M. M. Alamo, R. R. Moral, L. A. Perula de Torres, “Evaluation of a patient-centred approach in generalized musculoskeletal chronic pain/fibromyalgia patients in primary care”, Patient Educ Couns, Vol. 48, 2002, pp. 23-31.
 J. Price, G. Farmer, J. Harri, T. Hope, S. Kennedy, R. Mayou, “Attitudes of women with chronic pelvic pain to the gynaecological consultation: a qualitative study”, BJOG, Vol. 113, 2006, pp. 446-452.
 K. A. S. L. Ferreira, S. R. D. T. Siqueira, M. J. Teixeira, “Characteristics of pain, demographic and treatment of patients attending a Multidisciplinary Pain Center”, Caderno de Saúde Coletiva, Vol. 16, 2008, pp. 449-470.
 A. S. Sawsan, E. H. Richard, N. Vitaly, K. Jieun, N. Gina, K. Anson, W. David, J. C. Daniel, S. W. Tobias, “Changes in regional Gray matter volume in women with chronic pelvic pain: a voxel-based morphometry study”, Pain, 2012.