Elevated concentration and biologic activity of monocyte chemotactic protein-1 in the peritoneal fluid of patients with endometriosis**Supported by grant MT-12541 from the Medical Research Council, Ottawa, Ontario, Canada. ††Presented in part at the 4th World Congress of Gynecological Endocrinology, Madonna di Campiglio, Italy, February 12 to 19, 1995. ‡‡The following individuals were part of the gynecologic investigation group, Hôpital Saint-François d’Assise, Québec, Québec, Canada: Jacques Bergeron, M.D., Marc Bureau, M.D., Georges Quesnel, M.D., and Marc Villeneuve, M.D.