1. Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, Derio, Spain
2. Department of Biochemistry and Molecular Biology, University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, Spain
3. Human Reproduction Unit, Cruces University Hospital, Biocruces, University of the Basque Country, Bilbao, Spain
4. Instituto Valenciano de Infertilidad, IVI Bilbao, Spain