Text and Data Mining valid from 2019-04-01
First Online: 24 April 2019
Ethics approval and consent to participate
: The study was approved by the AOU Cagliari ethics committee. All patients gave informed consent.
: All patients gave a written consent to publish their data.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.