1. Department of Clinical Biochemistry, Virgen Macarena University Hospital, Medical School, University of Seville, Seville, Spain
2. Department of Biological Sciences, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina
3. Valencian Infertility Institute (IVI), Seville, Spain
4. Obstetrics and Gynecology Department, Virgen Macarena University Hospital, Medical School, University of Seville, Seville, Spain
5. Department of Biological Chemistry, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina