1. Public Health and Epidemiology Research Group, Division of Preventive Medicine and Public Health, School of Medicine, University of Murcia, Espinardo 30100, Murcia, Spain
2. Center of Operations Research, Miguel Hernández University, 03202 Elche, Spain
3. Department of Environmental and Chemical Engineering, Technical University of Cartagena, Cartagena 30202, Spain
4. Department of Reproductive Biology and Medicine, Instituto Bernabeu, Alicante 03016, Spain
5. Reproductive Medicine Chair, Miguel Hernández University-Instituto Bernabeu, Alicante 03016, Spain
6. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Barcelona 08036, Spain