Received: 29 November 2017
Accepted: 16 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was reviewed and approved by the IRST and AVR (Area Vasta Romagna) Ethics Committee (approval no. 1164), and informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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