Received: 24 February 2019
Accepted: 17 April 2019
First Online: 9 May 2019
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of the Università Cattolica del Sacro Cuore (Protocol number: 6334/15). Signed informed consent was obtained from each patient included before any activity of the study was started.
: Not applicable.
: The authors declare that they have no competing interests.
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