Received: 21 March 2019
Accepted: 6 June 2019
First Online: 18 June 2019
Ethics approval and consent to participate
: The Local Ethical Committee of the Children’s Hospital Vittore Buzzi, reviewed and approved the study and waived informed consent due to the observational and retrospective nature of the study.
: Not applicable
: Dr. Santuz received funding from Chiesi Farmaceutici S.p.A. The remaining authors declare that they have no competing interests.