1. Department of Paediatrics, University of Granada, 18012 Granada, Spain
2. CIBER de Epidemiología y Salud Pública, Laboratory of Medical Investigations, University Hospital San Cecilio, 18012 Granada, Spain
3. Dr. Von Hauner Children´s Hospital, Ludwig Maximilians University of Munich, D-80337 Munich, Germany
4. Department of Paediatrics, University of Pécs, H-7623 Pécs, Hungary
5. Department of Clinical Psychology, Evaluation and Personality, University of Granada, Campus Universitario de Cartuja, 18071 Granada, Spain
6. Department of Paediatrics, Institute of Developmental Neurology, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
7. Department of Biochemistry and Molecular Biology, University of Granada, Campus Universitario de Cartuja, 18071 Granada, Spain