Received: 1 May 2019
Accepted: 14 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the University of Bologna and was performed in compliance with the Declaration of Helsinki and its later amendments. Parents gave informed consent to the processing of personal data at the time of the clinical evaluation.
: Not applicable.
: The authors declare that they have no competing interests.