Text and Data Mining valid from 2020-03-30
Received: 4 April 2018
Accepted: 16 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: All the participants provided written informed consent to participate in the study after having received a description of the aims. The study was approved by the ethical committee of the Santa Maria alle Scotte Hospital of Siena.
: Not applicable.
: The authors declare that they have no competing interests.