Funding for this research was provided by:
Seconda Università degli Studi di Napoli
Associazione culturale Kàledo
Provincia di Napoli
Text and Data Mining valid from 2018-01-20
Received: 18 October 2017
Revised: 9 January 2018
Accepted: 10 January 2018
First Online: 20 January 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest
: All procedures performed in this study were in accordance with the ethical standards of the Second University of Naples and in accordance with the current international guidelines, the standards on human experimentation of the Ethics Committee of the Second University of Naples, Italy, and with the Helsinki Declaration of 1975, revised in 1983.
: Informed consent was obtained from the parents of the children who participated in the study.