Received: 9 July 2020
Accepted: 25 September 2020
First Online: 28 October 2020
Ethics approval and consent to participate
: Approval was obtained from the Ethics Committee of the Meyer Children Hospital, Florence, Italy, and the study was performed in accordance with the declaration of Helsinki.
: According to ethical guidelines, all images, biochemical data and nucleic acid samples were obtained for analysis, storage and publication after patients’ written informed consent, using a form approved by the local Ethics Committee (AOU Meyer Children Hospital of Florence, Italy).
: The authors declare that they have no competing interests.