Received: 13 April 2018
Accepted: 5 July 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: The ICONA Foundation study has been approved by IRB of all the participating centers. Sensitive data from patients are seen only in aggregate form. The research did not require approval from the ethics committee according to the Italian law since it was performed as an observational retrospective study in the context of normal clinical routines. All patients provided a written informed consent for the use of their data for research purposes. Data used for the study are openly available.
: Not applicable.
: The authors declare that they have no competing interests.
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