Funding for this research was provided by:
Received: 12 September 2017
Accepted: 21 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki and approved by the Ethics Guidelines of the Cattinara Hospital Etic Committee. The patients gave their written informed consent to participate to the study.
: The patients gave their written informed consent to publish the study.
: The authors declare that they have no competing interests.
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