Received: 22 December 2016
Accepted: 4 January 2018
First Online: 15 January 2018
: All the patients gave a proper informed consent to participate in the study. The study was approved by the Matera LHU ethics committee.
: Not applicable.
: The authors declare the following interests:FC, DP, CO, EB, MC, PM, and MZ report funding provided by Sanofi-Pasteur MSD, the study sponsor, to their employing institution (ISPO), to perform study-related activities.EAM and PSA report funding provided by Sanofi-Pasteur MSD, the study sponsor, to their employing institution, to perform study-related activities.GDF, LS, and EP were employees of Sanofi-Pasteur MSD at the time the study was conducted.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.