[1] Fondazione Osped Maggiore Policlin, Infertil Unit, I-20122 Milan, Italy
[2] Cairo Univ, Clin Director, Egyptian IVF ET Ctr, Cairo, Egypt
[3] Univ Edinburgh, Ctr Reprod Biol, Edinburgh EH8 9YL, Midlothian, Scotland
[4] McMaster Univ, Hamilton, ON, Canada
[5] Acad Hosp Maastricht, Dept Obstet & Gynecol, Maastricht, Netherlands
[6] Univ Med Ctr, Dept Reprod Med & Gynecol, Utrecht, Netherlands
[7] Vrije Univ Amsterdam Med Ctr, Dept Obstet & Gynaecol, Div Reprod Med, Amsterdam, Netherlands
[8] Univ Trondheim, Dept Obstet & Gynecol, N-7034 Trondheim, Norway
[9] Infertil & IVF Ctr, Thessaloniki, Greece
[10] Vrije Univ Brussel, Univ Ziekenhuis, Ctr Reprod Med, Brussels, Belgium
[11] Karolinska Inst, Stockholm, Sweden
[12] Univ Klinikum Schleswig Holstein, Klin Frauenheilkunde & Geburtshilfe, Lubeck, Germany
[13] Kings Coll London, Sch Biomed & Hlth Sci, Reprod & Rhythms Grp, London, England
[14] Univ Maastricht, Head Dept Genet & Cell Biol, Maastricht, Netherlands
[15] SISMeR, Bologna, Italy
[16] Family Planning & WW Serv, Edinburgh, Midlothian, Scotland