1. Department of Microscopy, Laboratory of Cell Biology, Multidisciplinary Unit for Biomedical Research-UMIB, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua Jorge Viterbo Ferreira, Porto, Portugal
2. Department of Genetics, Faculty of Medicine, University of Porto (FMUP), Porto, Portugal
3. Centre for Reproductive Genetics, Porto, Portugal
4. Department of Animal Biology, Faculty of Sciences, Centre for Environmental Biology, University of Lisbon, Lisbon, Portugal
5. Instituto Gulbenkian de Ciência, Oeiras, Portugal