Funding for this research was provided by:
Ministero della Salute - Regione Lombardia (RF-2011-02347106)
IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy (Progetto a concorso 2014-2015)
Received: 12 August 2017
Accepted: 29 December 2017
First Online: 12 January 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Ethics Committee (Fondazione IRCCS Ca′ Granda, Ospedale Maggiore Policlinico di Milano N°526/2015).All patients had signed a consent to use their biological material for research purposes; additional informed consent was not required for this retrospective study.
: Not applicable
: The authors declare that they have no financial nor ethical conflict of interest.
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