Text and Data Mining valid from 2020-04-28
Received: 26 September 2019
Accepted: 25 March 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: Not applicable. Informed consent was waived due to the retrospective nature of the study. The Ethics Committee of Marche Region does not require formal approval for observational studies that do not involve the use of drugs in accordance with the Regional Decree n.244 approved on 3/20/2017.
: Not applicable.
: he authors declare that they have no competing interests.