Received: 14 December 2017
Accepted: 11 June 2019
First Online: 5 July 2019
Ethics approval and consent to participate
: This study was judged exempt from ethics approval by the Ethical Committee of the University “Federico II” of Naples. In compliance with Italian legislation, ethics approval was judged not necessary for this study because none of the following procedures were performed:UnorderedList removedThe questionnaires administered to the experts participating in the study were anonymous, and no personal information attributable to the subjects investigated was collected.
: Not applicable.
: The authors declare that they have no competing interests.