Received: 30 May 2017
Accepted: 21 May 2018
First Online: 30 May 2018
Ethics approval and consent to participate
: The retrospective analysis of the patient data was approved by the Regional Ethics Committee of Liguria - Italy (protocol n° 164REG2016, September 22, 2016). No approval for the initial treatment of the patients was required being the procedure standard clinical practice in our Hospital. All the procedures mentioned in this study were carried on in accordance with the ethical standards and with the Helsinki Declaration of 1975, as revised in 2000. Patients were informed about risks, benefits, and alternative options to the proposed treatment and signed the informed consent form.
: The authors declare that they have no competing interests.
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