1. Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, University of Münster, Albert-Schweitzer-Campus 1, Gebäude D11, Münster, Germany
2. Department of Growth and Reproduction & International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Blegdamsvej, Copenhagen, Denmark
3. Institute of Human Genetics, University of Münster, Vesaliusweg, Münster, Germany
4. Centre of Reproductive Medicine and Andrology, Department of Clinical and Surgical Andrology, University of Münster, EAA Training Center, Albert Schweitzer Campus, Germany
5. Department of Gynecology and Obstetrics, UKM Fertility Center, University of Münster, Albert-Schweitzer-Campus, Gebäude, Münster, Germany