Pavlou, Maria
Giapros, Vasileios
Challa, Anna
Chaliasos, Nikolaos
Siomou, Ekaterini https://orcid.org/0000-0002-0032-9047
Article History
Received: 2 May 2018
Revised: 6 July 2018
Accepted: 17 July 2018
First Online: 25 July 2018
Compliance with ethical standards
: Written informed consent for their children to participate in the study was obtained from the parents of all study children and the study protocol was approved by the university hospital ethical committee.
: The authors declare that they have no conflict of interest.