Funding for this research was provided by:
University of Palermo (ATE 0381)
Text and Data Mining valid from 2018-10-22
Received: 1 June 2018
Accepted: 4 October 2018
First Online: 22 October 2018
Ethics approval and consent to participate
: This study was approved by the ethical committee of University hospital Policlinico Paolo Giaccone, Palermo, Italy. Informed consent was signed by all participants.
: Informed consent was obtained from each patient and control.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.