Received: 6 June 2017
Accepted: 5 February 2018
First Online: 13 February 2018
Change Date: 12 April 2018
Change Type: Correction
Change Details: Following the publication of the original article , it was brought to our attention that the authors’ names and surnames were erroneously interchanged.
Ethics approval and consent to participate
: The Ethics Committee of the Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Cà Granda Ospedale Maggiore Policlinico approved the study (approval number: 1092), and written informed consent was obtained from the parents. All clinical investigations were conducted according to the principles expressed in the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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