Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialities, Specialities "G. D'Alessandro," University of Palermo, Palermo, Italy. UOC Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, Genoa, Italy. Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialities, Specialities "G. D'Alessandro," University of Palermo, Palermo, Italy. salvatore.mangano@unipa.it. Department of Experimental Biomedicine and Clinical Neurosciences, University of Palermo, Palermo, Italy. Child Neuropsychiatry Department, Di Cristina - ARNAS Civico Hospital, Palermo, Italy.