Funding for this research was provided by:
Italian Ministry of University and Research (PRIN 2006, PRIN 2009)
Text and Data Mining valid from 2019-07-29
Received: 23 April 2019
Accepted: 18 July 2019
First Online: 29 July 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures 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 protocol received approval from the Ethical Committee of the Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan (Prot. no. 2035, amendment 30/11/2011).
: An informed consent was obtained from all participants.