[1] Zaragoza Univ, Lozano Blesa Univ Hosp, Dept Obstet & Gynecol, Fac Med, Zaragoza 50009, Spain
[2] Carol Davila Univ Med & Pharm, Dept Obstet & Gynecol, Bucharest, Romania
[3] Dr I Cantacuzino Hosp, Dept Obstet & Gynecol, Bucharest, Romania
[4] Univ Hosp, Breast Clin, De Pintelaan 185, B-9000 Ghent, Belgium
[5] Univ Hosp, Menopause Clin, De Pintelaan 185, B-9000 Ghent, Belgium
[6] Univ Birmingham, Inst Canc & Genom, Lawson Tait Prof Gynaecol Canc, Birmingham, W Midlands, England
[7] Natl & Kapodestrian Univ Athens, Dept Obstet & Gynecol 2, Athens, Greece
[8] Univ Womens Hosp Tuebingen, Calwer St 7, D-72076 Tubingen, Germany
[9] Istanbul Univ, Cerrahpasa Sch Med, Dept Obstet & Gynecol, Div Reprod Endocrinol,IVF Unit, Istanbul, Turkey
[10] Univ Pisa, Dept Clin & Expt Med, Via Roma 67, I-56100 Pisa, Italy
[11] Imperial Coll London, Royal Brompton Hosp, Natl Heart & Lung Inst, London SW3 6NP, England
[12] Univ Womens Hosp, Dept Obstet & Gynecol, Bern, Switzerland
[13] John Radcliffe Hosp, Womens Ctr, Oxford OX3 9DU, England