1. Network for Young Researchers in Andrology (NYRA) 1 , 08021 Barcelona , Spain
2. University of East Anglia 2 School of Biological Science , , NR4 7TJ Norwich , UK
3. European Sperm Bank Struenseegade 9, 2, 2200 3 Copenhagen , Denmark
4. Biology of the Testis lab, University Medical Campus, Vrije Universiteit Brussel, 1090 4 Brussels , Belgium
5. School of BioSciences, The University of Melbourne, Parkville, Victoria, 3010 5 , Australia
6. 6 University Department of Growth and Reproduction, Section GR-5064, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
7. Ar-Razzi Hospital, 8968+JF2 Baghdad 7 , Iraq
8. 8 Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, CH-1211 Genève 4, Switzerland
9. Université Paris Cité, INSERM, CNRS, Institut Cochin 9 , F-75014 Paris , France