1. Merck Healthcare KGaA, Darmstadt, Germany
2. Ares Trading S.A. Eysins (An affiliate of Merck KGaA), Switzerland
3. School of Clinical and Experimental Medicine, Unit of Endocrinology, University of Modena and Reggio Emilia, Modena, MO, Italy
4. Global Clinical Development, Merck Serono S.p.A, Rome, Italy, an affiliate of Merck KGaA, Darmstadt, Germany
5. Department of Development and Regeneration, Laboratory of Endometrium, Endometriosis & Reproductive Medicine, KU Leuven, Leuven, Belgium
6. Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University Medical School, New Haven, CT, USA