1. Pediatric Environmental Health Speciality Unit, Department of Pediatrics, Institute of Biomedical Research, IMIB-Arrixaca, Hospital Clinical University Virgen of Arrixaca, Murcia, Spain.
2. Servicio de Pediatría, Hospital Universitario La Paz, Madrid, Spain.
3. Division of Preventive Medicine and Public Health, Department of Health and Social Sciences, IMIB-Arrixaca, University of Murcia School of Medicine, Murcia, Spain.
4. Endocrinology Unit, Department of Pediatrics, Hospital Clinical University Virgen of Arrixaca, Murcia, Spain.