Text and Data Mining valid from 2019-07-10
Received: 17 September 2018
Accepted: 21 June 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: Participants’ legal guardian gave written informed consent for the experimental procedure, which was approved by the Ethics Committee of Parma (prot. 32074). Participation in the study was voluntary and the participants were not paid. The study was conducted in line with the Declaration of Helsinki 2013.
: Not applicable
: The authors declare that they have no competing interests.