Funding for this research was provided by:
Ministero della Salute
Received: 21 July 2020
Accepted: 27 November 2020
First Online: 3 December 2020
Ethics approval and consent to participate
: Prior to analysis the samples were de-identified. Each patient gave the written informed consent for the research. This study was authorized by the Institutional Ethics Committee (ASL MI2-Melegnano via VIII Giugno, Milan).
: Informed consent was obtained from all patients prior to enrolment. Consent for publication has been obtained from all authors.
: The authors declare they have no competing interests.