Funding for this research was provided by:
Ministero della Salute (I85J10000500001)
Text and Data Mining valid from 2019-03-05
Received: 16 October 2018
Accepted: 18 February 2019
First Online: 5 March 2019
Ethics approval and consent to participate
: The study was approved by the ethical committee of the Azienda Ospedaliera Universitaria Policlinico “Paolo Giaccone” in Palermo (approval code n.9/2011).
: Not applicable.
: Authors declare no conflict if interest.
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