Moramarco, Filippo
Pezzicoli, Alfredo
Salvini, Laura
Leuzzi, Rosanna
Pansegrau, Werner
Balducci, Enrico
Article History
Received: 3 June 2019
Accepted: 21 October 2019
First Online: 19 November 2019
Competing interests
: GSK Vaccines provided Research support for the study and salary for A.P., W.P. and R.L., currently GSK permanent employees. F.M. received a GSK graduate fellowship from the University of Bologna. E.B. and L.S. report no financial competing interests. The authors declare no non-financial interests.