Ballardini, Elisa http://orcid.org/0000-0002-8813-1835
Sisti, M.
Basaglia, N.
Benedetto, M.
Baldan, A.
Borgna-Pignatti, C.
Garani, G.
Article History
Received: 12 January 2018
Revised: 11 July 2018
Accepted: 12 July 2018
First Online: 20 July 2018
Compliance with ethical statements
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.
: This project was approved by the Ethics Committee of Ferrara University Hospital, on September 2014. All parents received an informative letter together with the vaccine invitation and an informative report at the visit day. Then who accepted signed a consent form.