Text and Data Mining valid from 2019-11-27
Received: 1 May 2019
Accepted: 13 September 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The datasets used for the current study came from seven published studies. The institutional review board of each hospital (Ethics Committee Milan, zones 1 and 2) approved each study, and written consent was obtained according to the regulations applied in each Institution.
: Not applicable
: The authors declare that they have no competing interests.