1. Centre for Reproductive Medicine and Andrology, University of Münster, Domagkstrasse 11, 48149 Münster, Germany
2. Biology of Reproduction and Stem Cell Group, Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Rua Larga, Faculty of Medicine, Pólo I, 3004-504 Coimbra, Portugal
3. Institute for Interdisciplinary Research, University of Coimbra, Casa Costa Alemão, Pólo II, Rua Dom Francisco Lemos, 3030-789 Coimbra, Portugal
4. Institute for Applied Math: Analysis and Numerics Department of Mathematics and Computer Science, University of Münster, Einsteinstraße 62, 48149 Münster, Germany