Funding for this research was provided by:
Ministero della Salute (NET-2013-02356160)
Text and Data Mining valid from 2019-12-01
Received: 9 December 2019
Accepted: 11 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: The study followed ethical principles of Helsinki declaration and local ethical standards. Informed consent was signed by participants or their legal representatives.
: Participants offered their consent to data publication.
: The authors declare that they have no competing interests.