[1] Univ Hosp Leuven, UZ Gasthuisberg, Leuven Univ Fertil Ctr, Dept Obstet & Gynecol, B-3000 Louvain, Belgium
[2] Katholieke Univ Leuven, Louvain, Belgium
[3] Maastricht Univ Med Ctr, Res Inst GROW, Dept Obstet & Gynaecol, Maastricht, Netherlands
[4] World Endometriosis Res Fdn, London, England
[5] Hannover Med Sch, D-30623 Hannover, Germany
[6] Semmelweis Univ, Budapest, Hungary
[7] Corvinus Univ, Budapest, Hungary
[8] Univ Hosp Ctr, Clermont Ferrand, France
[9] Univ Pavia, I-27100 Pavia, Italy
[10] Univ Wisconsin, Madison, WI USA
[11] Cleveland Clin, Cleveland, OH 44106 USA
[12] NHS Natl Serv Scotland, Edinburgh, Midlothian, Scotland
[13] Praxis Fertilitat KEZ Berlin, Berlin, Germany
[14] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[15] Univ Copenhagen, Copenhagen, Denmark
[16] Univ Bern, Bern, Switzerland
[17] Univ Milan, Milan, Italy